Document:

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                                                                    EXHIBIT 10.3

                          TRANSITION SERVICES AGREEMENT

     THIS TRANSITION SERVICES AGREEMENT (the "Agreement"), is dated as of
July 23, 2002, by and between IMPCO Technologies, Inc., a Delaware corporation
("IMPCO"), and Quantum Fuel Systems Technologies Worldwide, Inc., a Delaware
corporation ("Quantum").

     WHEREAS, concurrently herewith, IMPCO and Quantum are entering into a
Contribution and Distribution Agreement (the "Distribution Agreement"), which
provides for, among other things, the contribution by IMPCO to Quantum of
certain assets relating to IMPCO's Automotive OEM Business (the "Business");

     WHEREAS, the Board of Directors of IMPCO has determined that it is
appropriate, desirable and in the best interests of IMPCO and its businesses as
well as of the holders of IMPCO Common Stock, to distribute to the holders of
the IMPCO Common Stock all the outstanding shares of Quantum common stock, par
value $0.001 per share, as set forth in the Distribution Agreement;

     WHEREAS, in order to facilitate an orderly transition of the Business under
the Distribution Agreement, the parties desire that IMPCO make available to
Quantum the Services (as defined below) on the terms set forth herein; and

     WHEREAS, capitalized terms used herein and not otherwise defined shall have
the meanings given to such terms in the Distribution Agreement.

     NOW, THEREFORE, in consideration of the above premises and for other good
and valuable consideration, the receipt and adequacy of which are hereby
acknowledged, the parties, intending to be legally bound, agree as follows:

                                   ARTICLE 1

                                   SERVICES

     1.1  Services.

          (a) Type of Services. Except as otherwise provided herein, for the
term determined pursuant to Section 1.2 hereof, IMPCO shall, as may reasonably
be requested by Quantum upon reasonable notice from time to time on and after
the Contribution Date (which shall be referred to herein as the "Effective
Date"), provide or cause to be provided to Quantum services in support of the
Business, consisting of those generically described services summarized on
Exhibit A attached hereto and set forth with specificity in Exhibit B (comprised
of statements of work) attached hereto (the "Services"). Subject to the
limitations set forth in this Agreement, the Services shall be performed in the
manner, to the extent and at

<PAGE>

a time substantially consistent with the manner in which IMPCO provided such
Services to the Business prior to the Distribution Date.

          (b) Services Performed by Others. IMPCO may, in its reasonable
discretion, cause any of the Services to be provided by any other person or
entity that is providing, has provided or may from time to time provide, the
same or similar services for IMPCO or are reasonably necessary for the efficient
performance of any of such Services. IMPCO will provide Quantum with twenty (20)
days' notice prior to any such transfer of the Services.

          (c) Statements of Work. IMPCO and Quantum may agree to additional
Services pursuant to this Agreement by entering into additional statements of
work (the "Statements of Work") from time to time during the term of this
Agreement, each of which will, at a minimum, include the following:

               (i) A reference to this Agreement, which reference will be
deemed to incorporate all applicable provisions of this Agreement;

               (ii) The date as of which the applicable Statement of Work will
be effective and, if applicable, the term or period of time during which IMPCO
will provide the applicable services and resources to Quantum pursuant to that
Statement of Work;

               (iii) A description of the Services to be provided by IMPCO to
Quantum pursuant to that Statement of Work, including, but not limited to, the
location at which the applicable Services are to be provided, and all
deliverables to be provided as part of the applicable Services pursuant to that
Statement of Work;

               (iv) A designation of the individual who will have management
responsibility for IMPCO and Quantum, respectively, in connection with that
Statement of Work;

               (v) The fees, costs and expenses, if any, payable by Quantum to
IMPCO for the Services to be provided pursuant to that Statement of Work; and

               (vi) Any additional provisions applicable to the Services
provided under that Statement of Work that are not otherwise set forth in this
Agreement or that are exceptions to the provisions set forth in this Agreement.

A form of statement of work is attached hereto as Exhibit C. No Statement of
Work will become effective until it has been executed by an authorized
representative of both IMPCO and Quantum.

     1.2 Term. The term of this Agreement shall commence on the Effective Date
and shall remain in effect until the expiration the period ending six (6) months
after the date of this Agreement (the "Term"), unless this Agreement is earlier
terminated pursuant to Section 1.7.

                                       -2-

<PAGE>

Notwithstanding the expiration of the Term, each Statement of Work entered into
prior to the date of such expiration will remain in full force and effect in
accordance with the provisions thereof, including each of the provisions of this
Agreement incorporated by reference into such Statement of Work. This Agreement
may be extended by written agreement executed by both parties either in whole or
with respect to one or more of the Services; provided, however, that such
extension shall only apply to the Service for which the Agreement was extended.
The parties may agree on an earlier expiration date for a specific Service.

     1.3  Payment of Fees and Expenses.

          (a) Service Charge. As consideration for the provision of the
Services, Quantum shall, for each Service performed, pay IMPCO (a) a fee equal
to (i) the salary of the respective employees performing the Services pro rated
in accordance with the number of hours actually worked in the performance
thereof (the "Pro-Rated Salary") plus (ii) an additional thirty percent (30%) of
the Pro-Rated Salary (to cover employee benefits, overhead costs and the like)
(the "Fee"), and (b) all out-of-pocket expenses incurred in connection with
IMPCO's provision of the Services (the "Expenses") which are not included as
part of the Fee (such Fee and any Expenses being collectively referred to in
this Agreement as the "Service Charge" for such Service). In the event the
Service is terminated, the Fee for such Service will be prorated for the number
of days of Service received in the calendar month (based on a thirty day month)
in which the Service is terminated.

          (b) Payment Terms. IMPCO shall invoice Quantum monthly for all amounts
due under the Statements of Work. Such invoices shall be accompanied by
reasonable documentation or other reasonable explanation supporting such
amounts. Each invoice submitted by IMPCO hereunder shall be substantially in the
form attached as Exhibit D hereto. Quantum shall pay IMPCO all amounts due under
the Statements of Work within thirty (30) days after receipt of an invoice
therefor. Any fees or payments owing to IMPCO under this Agreement remaining
unpaid after such date shall accrue interest at the lower of (i) the prime rate
plus two percent per month, or (ii) the highest lawful rate of interest,
calculated from the date such amount was due until the date such payment is
received by IMPCO.

          (c) Taxes. Quantum shall pay any value-added tax and any tariff, duty,
export or import fee, sales tax, use tax, service tax or other tax or charge
(excluding income tax) imposed by any government or governmental agency on IMPCO
or Quantum with respect to the Services or the performance of this Agreement.

          (d) Performance Under Ancillary Agreements. Notwithstanding anything
to the contrary contained herein, Quantum shall not be charged under this
Agreement for any services that are required to be performed by IMPCO for
Quantum under the Distribution Agreement or any other Ancillary Agreement (as
defined in the Distribution Agreement) and any such other services shall be
performed and charged for in accordance

                                       -3-

<PAGE>

with the Distribution Agreement or such other Ancillary Agreement, as the case
may be. Quantum shall not be charged for any Services performed before the
Effective Date.

     1.4  General Obligations; Standard of Care.

          (a) Performance Requirements. Subject to Subsections 1.1(a) and
1.5(b), IMPCO shall maintain sufficient resources to perform its obligations
hereunder; provided that Quantum shall reimburse IMPCO in accordance with
Section 1.3 for any costs and expenses IMPCO incurs in connection with the
provision of the Services. IMPCO shall use commercially reasonable efforts to
provide Services in accordance with the policies, procedures and practices in
effect with respect to the Business prior to the Distribution Date and shall
exercise the same care and skill as it exercises in performing similar services
for itself (the "Standard of Care").

          (b) Good Faith Cooperation; Consents. The parties will use good faith
efforts to cooperate with each other in all matters relating to the provision
and receipt of the Services. Such cooperation shall include exchanging
information necessary for the provision of the Services (subject to Section
1.6(a) of this Agreement), performing true-ups and adjustments and obtaining all
applicable consents, licenses, sublicenses or approvals necessary to permit each
party to perform its obligations hereunder. The costs of obtaining such
consents, licenses, sublicenses or approvals shall be paid by Quantum. The
parties will maintain reasonable documentation related to the Services and
cooperate with each other in making such information available as needed, in all
cases in compliance with all applicable law.

     1.5  Certain Limitations.

          (a) Impracticability. IMPCO shall not be required to provide any
Service to the extent the performance of such Service (i) would require the
services of those former employees of the Business who are employed by Quantum
after the Distribution Date, or (ii) would require the services of those former
employees of the Business who were not selected for employment by Quantum and
who subsequently have been terminated from employment by IMPCO, or (iii) would
require IMPCO to violate any applicable laws, rules or regulations. IMPCO shall
be relieved of any obligations hereunder to the extent that Quantum's failure to
take any action may reasonably render performance by IMPCO of such obligations
unlawful or commercially impracticable.

          (b) Limitations on Services. IMPCO shall not be obligated to provide
Services hereunder that are greater in nature and scope than the comparable
services provided by IMPCO to Quantum or the Business prior to the Distribution
Date, or that are greater in nature or scope than comparable services provided
by IMPCO during the Term to its own internal organizations, except as may be
specifically provided on Schedule A to this Agreement. IMPCO shall not be
required to expand its facilities, incur new long-term capital expenses, employ
additional personnel or maintain the employment of any specific employee in
order to provide the Services to Quantum.

                                       -4-

<PAGE>

          (c) Right to Determine Priority. If there is an unavoidable conflict
between the immediate needs of IMPCO and those of Quantum as to the use of or
access to a particular Service to be provided by IMPCO, IMPCO shall have the
right, in its sole discretion, to establish reasonable priorities, at particular
times and under particular circumstances, as between IMPCO and Quantum in
providing such Service. In any such situation, IMPCO shall provide notice to
Quantum of the establishment of such priorities at the earliest practicable time
and no such priorities shall result in the violation of applicable law.

     1.6 Confidentiality; Ownership

          (a) Information Subject to Other Obligations. Each party hereto will
regard and preserve as confidential and proprietary all confidential information
of the other party, whether written, oral or computer based, to which it has or
had access during its performance pursuant to this Agreement. Neither party
will, without the prior written consent from the other party, disclose to any
person (except as set forth in Sections 1.6(b) through 1.6(d) below) or use for
its own benefit (or permit the use of) any such information, except in order to
exercise such party's rights and fulfill such party's obligations under this
Agreement. Each party shall take all reasonable precautions to ensure that all
of its employees, agents and assistants and employees of its subcontractors
treat such information as confidential and do not divulge such information
through willful actions or gross negligence. All such information provided
pursuant to this Agreement remains the property of the party providing such
information and shall be returned to that party upon demand and shall not be
reproduced in any manner except as required for performance of this Agreement.
As used in this Agreement, "confidential information" means any and all
information and material disclosed by party to the other party (whether in
writing, or in oral, graphic, electronic or any other form) that is marked or
designated in writing as confidential or proprietary, or if disclosed orally or
in other intangible form or in any form that is not so marked, that is
identified as confidential at the time of such disclosure and summarized in
writing and transmitted to the receiving party within thirty (30) days of such
disclosure.

          (b) Exceptions. The obligations set forth in Section 1.6(a) shall not
apply to information that is:

               (i) generally available to the public or subsequently becomes
generally available to the public through no breach by the receiving party of
its obligations under this Agreement or any other agreements between the parties
hereto concerning such information;

               (ii) received from a third party who is legally free to disclose
such information and who did not receive such information in confidence from the
disclosing party; and

                                       5

<PAGE>

               (iii) independently developed by the receiving party without
reference to the information received from the disclosing party.

          (c) Permitted Disclosures. Notwithstanding any provision of this
Section 1.6 to the contrary, in exercising the rights granted under this
Agreement and in performing its obligations under this Agreement, IMPCO may
disclose the confidential information of Quantum to its employees and
independent contractors who need to know such information and who are bound by
confidentiality obligations to keep such information confidential.

          (d) Protective Arrangements. In the event that any party either
determines on the advice of its counsel that it is required to disclose any
confidential information of the other party pursuant to applicable law
(including but not limited to U.S. securities laws and regulations) or receives
any demand under legal process or from any governmental authority to disclose or
provide the confidential information of any other party (or any affiliate
thereof) that is subject to the confidentiality provisions of this Section 1.6,
such party shall notify the other party prior to disclosing or providing such
confidential information and shall cooperate at the expense of the requesting
party in seeking any reasonable protective arrangements requested by such other
party. Subject to the foregoing, the information subject to such request or
requirement may be disclosed or provided to the extent required by such law (as
so advised by counsel) or by legal process or such governmental authority.

          (e) Ownership; Return. Except to the extent inconsistent with the
express terms of the Distribution Agreement or any Ancillary Agreement other
than this Agreement, or except as specifically set forth in the applicable
Statement of Work, the parties agree that:

               (i) title to all Technology and Documentation existing prior to
the performance of the Services and used in performing the Services provided
hereunder shall remain in the name of the party holding title as of the date
performance of such Services commences;

               (ii) to the extent the provision of any Service involves the
Development of any Technology, Documentation, improvements of and/or any other
intellectual property other than Quantum Work Product (as defined below),
including without limitation software programs, charts, diagrams, source
materials, patented, patentable, copyrighted or copyrightable materials, or
materials constituting trade secrets, (A) Quantum shall not use in any manner,
copy, modify, reverse engineer, decompile, or otherwise attempt to discover the
basis or source code of, or in any way alter any of such Technology,
Documentation, and materials, or otherwise use such materials in any manner,
without IMPCO's express prior written consent which may be given in IMPCO's sole
discretion, and (B) IMPCO shall exclusively own all right, title and interest in
and to such Technology, Documentation and/or intellectual property unless
otherwise expressly agreed by the parties in the applicable Statement of Work;

                                      -6-

<PAGE>

               (iii) if and to the extent that in connection with IMPCO's
performance of the Services pursuant to this Agreement during the term of this
Agreement, IMPCO creates, during the term of this Agreement, and provides
Quantum with, any work product ordered or commissioned by Quantum that
constitutes (i) a Quantum Asset acquired by Quantum from IMPCO pursuant to the
Distribution Agreement, or (ii) any other Quantum Asset already owned
exclusively by Quantum, such work product shall be the exclusive property of
Quantum (such work product hereinafter referred to as "Quantum Work Product"),
provided that such work product shall be expressly designated as a Quantum Work
Product in the applicable Statement of Work; and

               (iv) upon the termination of any of the Services, each of IMPCO
and Quantum shall return to the other, as soon as practicable, any equipment or
other property of the other relating to the Services which is owned or leased by
it and is or was in its possession or control.

     1.7  Termination.

          (a) Election to Terminate. Quantum may terminate this Agreement
either with respect to all, or with respect to any one or more, of the Services
provided hereunder at any time and from time to time, for any reason or no
reason, by giving written notice to IMPCO at least thirty (30) days prior to the
date of such termination. IMPCO may terminate this Agreement with respect to
all, or with respect to any one or more, of the Services provided hereunder at
any time and from time to time, in the event of a material breach by Quantum of
its obligations hereunder (other than a payment default), by giving thirty (30)
days prior written notice to Quantum of such breach and such breach remaining
uncured as of the expiration of such thirty (30) day period. In addition, the
parties may at any time agree in writing to terminate this Agreement with
respect to some or all of the Services, effective immediately or as indicated in
such writing.

          (b) Discontinuation of Service. IMPCO may terminate any Service upon
thirty (30) days prior written notice to Quantum that IMPCO is discontinuing the
provision of such Service to its own internal organizations.

          (c) Termination for Payment Default. If any payment required under
this Agreement or any Statement of Work is not paid by Quantum when due, IMPCO
shall have the right, without any liability to Quantum, or anyone claiming by or
through Quantum, to cease providing any or all of the Services provided by IMPCO
to Quantum hereunder or pursuant to any Statement of Work, which right may be
exercised by IMPCO in its sole and absolute discretion. IMPCO shall provide
Quantum with thirty (30) days prior written notice to Quantum of its intent to
terminate such Services hereunder, and if Quantum fails to pay all amounts due
for such Service(s) (including any accrued late fee) prior to the expiration of
such thirty (30) day period, IMPCO shall have the right to cease any or all
Services pursuant to this Section 1.7(c).

                                      -7-

<PAGE>

          (d) Automatic Termination. Except to the extent the parties otherwise
agree in writing, and except where a longer term is agreed to in writing between
the parties for any particular Service, this Agreement will automatically
terminate at the close of business on the last day of the Term.

          (e) Termination of Less Than All Services. Subject to Section 1.7(d),
in the event of any termination with respect to one or more, but less than all,
Services, this Agreement shall continue in full force and effect with respect to
any Services not terminated hereby.

     1.8  Disclaimer of Warranties, Limitation of Liability And Indemnification.

          (a) Disclaimer of Warranties. EXCEPT AS EXPRESSLY PROVIDED IN THIS
AGREEMENT, IMPCO HEREBY EXPRESSLY DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE, WITH RESPECT TO THE SERVICES AND ALL IMPLIED
WARRANTIES ARISING FROM COURSE OF PERFORMANCE, COURSE OF DEALING OR USAGE OF
TRADE. EXCEPT AS EXPRESSLY PROVIDED IN THIS AGREEMENT, IMPCO MAKES NO
REPRESENTATIONS OR WARRANTIES AS TO THE QUALITY, SUITABILITY OR ADEQUACY OF THE
SERVICES FOR ANY PURPOSE OR USE.

          (b) Limitation of Liability. Quantum acknowledges that IMPCO is not in
the business of providing Services in the manner contemplated by this Agreement
and that the Services are being provided pursuant to this Agreement as an
accommodation to Quantum to assist in the transition of the Business to Quantum.
Except with respect to losses or damages actually suffered or incurred by
Quantum as a result of IMPCO's willful misconduct, fraud or gross negligence in
providing the Services, IMPCO's aggregate liability to Quantum for damages in
connection with this Agreement and the Services provided hereunder, regardless
of the form of action giving rise to such liability (whether under contract,
tort, statutory or otherwise) shall not exceed the aggregate fees for the
related Services charged by IMPCO hereunder. To the extent permitted permitted
by applicable law and notwithstanding anything in this Agreement to the
contrary, IMPCO shall not be liable for any indirect, exemplary, special,
consequential or incidental damages of any kind, or for any damages resulting
from loss or interruption of business, lost data or lost profits, arising out of
or relating to this Agreement, the Services or IMPCO's performance under this
Agreement, however caused, even if IMPCO has been advised of or should have
known of the possibility of such damages.

          (c) Indemnification of IMPCO. Quantum shall indemnify and hold
harmless IMPCO and its officers, directors, employees, agents and affiliates
(collectively, "Indemnitees"), from and against all liabilities, losses,
damages, expenses, fines and penalties, including reasonable attorneys' fees and
disbursements, incurred by any Indemnitee as a result of any claim made against
any Indemnitee by any third party in connection with IMPCO's

                                      -8-

<PAGE>

provision of the Services or arising out of Quantum's negligence or malfeasance
in connection with its use of the Services.

     1.9  Representative. The parties shall each appoint a representative (each,
a "Representative") to facilitate communications and performance under this
Agreement. The initial Representative of IMPCO shall be
___________________________ and the initial Representative of Quantum shall be
___________________________. Each party will provide written notice to the other
party of the name and contact information of such party's Representative. Each
party shall have the right at any time and from time to time to replace its
Representative by giving notice in writing to the other party.

     1.10 Records. IMPCO will maintain complete and accurate records relating to
the Services performed under this Agreement and records of all amounts billable
to and payments made by Quantum made under this Agreement, in accordance with
generally accepted accounting principles. IMPCO will maintain such records for
one year after termination or expiration of this Agreement and will make all
such records available to Quantum or its designee (subject in each case to
Section 1.6 of this Agreement) during normal business hours upon Quantum's
request.

     1.11 Disputes. In the event any dispute arises out of or in connection with
the execution, interpretation, performance or nonperformance of this Agreement,
the parties agree to settle such dispute as follows: The appropriate
Representative for such dispute shall negotiate in good faith for a reasonable
period of time to settle such dispute; provided, however, such reasonable period
shall not, unless otherwise agreed by the parties in writing, exceed thirty (30)
days from the time the parties began such negotiations. If after such reasonable
period the Representatives are unable to settle the dispute, IMPCO and Quantum
agree to settle such dispute in accordance with the dispute resolution mechanism
set forth in Article VII of the Distribution Agreement.

                                   ARTICLE 2

                                  MISCELLANEOUS

     2.1  Relationship of Parties. IMPCO shall be deemed an independent
contractor hereunder and neither party shall have authority to act for or
represent the other party or bind or commit the other party to any agreement or
obligation. Nothing in this Agreement shall be deemed or construed by the
parties or any third party as creating the relationship of principal and agent,
partnership or joint venture between the parties, it being understood and agreed
that no provision contained herein, and no act of the parties, shall be deemed
to create any relationship between the parties other than the relationship of
independent contractor nor be deemed to vest any rights, interest or claims in
any third parties.

                                      -9-

<PAGE>

     2.2  Modification And Amendment; Entire Agreement.

          (a) This Agreement may not be modified or amended except in a writing
signed by the parties. This Agreement sets forth the entire agreement of the
parties hereto with respect to the subject matter hereof and supersedes all
prior agreements and understandings between the parties with respect to the
subject matter hereof. In the event of a conflict among or between this
Agreement, any Statement of Work and any Change Authorization (as defined
below), the terms of this Agreement shall prevail first, the Change
Authorization second; and the Statement of Work third.

          (b) Either party may request changes to any and all Statements of Work
by preparing and submitting a written proposal ("Change Authorization"), which
sets forth any modifications to the applicable Statement of Work, including
changes to the specifications, estimated charges, expenditures limits,
completion schedule or other terms. A Change Authorization or other written
agreement signed and dated by an authorized representative of both parties is
the only means of modifying the Statements of Work. When both parties sign the
Change Authorization, the change will become a part of the applicable Statement
of Work. The Change Authorization will modify and take precedence over any
inconsistent terms of either the Statement of Work being modified or any
previous Change Authorization relating to the Statement of Work being modified.

     2.3  Severability. If any term or other provision of this Agreement is
invalid, illegal or incapable of being enforced by any law or public policy, all
other terms and provisions of this Agreement shall nevertheless remain in full
force and effect so long as the economic or legal substance of the transactions
contemplated hereby is not affected in any manner materially adverse to any
party. Upon such determination that any term or other provision is invalid,
illegal or incapable of being enforced, the parties hereto shall negotiate in
good faith to modify this Agreement so as to effect the original intent of the
parties as closely as possible in an acceptable manner in order that the
transactions contemplated hereby are consummated as originally contemplated to
the greatest extent possible. Notwithstanding the foregoing, the parties hereto
shall have the right to terminate this Agreement in accordance with Section 1.7.

     2.4  Governing Law. This Agreement shall be governed by the laws of the
State of California, without regard to conflict of laws principles. All disputes
arising in connection therewith shall be heard only by a court of competent
jurisdiction in Los Angeles County, California, and the prevailing party in any
legal proceeding shall be entitled to recover its reasonable attorneys' fees
incurred in connection therewith.

     2.5  Survival. The parties' rights and obligations which by their sense and
context are intended to survive any termination or expiration of this Agreement
shall so survive, including but not limited to Sections 1.3, 1.6, 1.8 and 1.11.

                                      -10-

<PAGE>

     2.6 Assignment. This Agreement shall not be assignable, in whole or in
part, directly or indirectly, by operation of law or otherwise, by any party
hereto without the prior written consent of the other parties hereto, and any
attempt to assign any rights or obligations arising under this Agreement without
such consent shall be void; provided however, that this Section 2.6 shall not
limit IMPCO's right to cause any of the Services to be performed by a third
party pursuant to Section 1.1(b) of this Agreement.

     2.7 Force Majeure. IMPCO shall not be in default of its obligations
hereunder for any delays or failure in performance resulting from any cause or
circumstance beyond the reasonable control of IMPCO (including without
limitation, acts of God, acts of government, fire, equipment breakdown, strikes
or other similar labor disputes, or the inability to acquire materials or third
party services), provided that IMPCO exercises commercially reasonable efforts
to perform its obligations in a timely manner. If any such occurrence prevents
IMPCO from providing any of the Services, IMPCO shall cooperate with Quantum in
obtaining, at Quantum's sole expense, an alternative source for the affected
Services, and Quantum shall be released from any payment obligation to IMPCO in
respect of such Services during the period of such force majeure.

     2.8 Successors. Subject to the restrictions on assignment set forth in
Section 2.6, this Agreement shall be binding upon and inure to the benefit of
and be enforceable against the parties hereto and their respective successors
and assigns.

     2.9 Third Party Beneficiaries. Each party intends that this Agreement shall
not benefit or create any right or cause of action in or on behalf of any person
or entity other than IMPCO and Quantum.

     2.10 Counterparts. This Agreement may be executed in one or more
counterparts, each of which shall be deemed an original but all of which shall
be considered one and the same instrument.

     2.11 Non-Exclusivity. Nothing in this Agreement precludes Quantum from
obtaining, in whole or in part, services of any nature that may be obtainable
from its own employees or from providers other than IMPCO and its Subsidiaries.

     2.12 Notice. Any notice, request, instruction, or other document required
by this Agreement shall be in given in accordance with Section 9.6 of the
Distribution Agreement.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

                                      -11-

<PAGE>

     IN WITNESS WHEREOF, the parties have executed this Agreement as of the date
first above written.

                          IMPCO TECHNOLOGIES, INC.

                          By:      /s/ Robert M. Stemmler
                                ------------------------------------------------
                                   Name: Robert M. Stemmler
                                   Title: President and Chief Executive Officer

                          QUANTUM FUEL SYSTEMS TECHNOLOGIES WORLDWIDE, INC.

                          By:      /s/ Alan P. Niedzwiecki
                                ------------------------------------------------
                                   Name: Alan P. Niedzwiecki
                                   Title: President and Chief Operating Officer

                                      -12-

<PAGE>

                                    EXHIBIT A

                                    SERVICES
                                    --------

1.       Employee Benefits Administration and Support

2.       Immigration Services

3.       Payroll Processing

4.       Affirmative Action Administration

<PAGE>

                                    EXHIBIT B

                               STATEMENTS OF WORK
                               ------------------

<PAGE>

                                    EXHIBIT C

                             FORM STATEMENT OF WORK
                             ----------------------

                            FORM - STATEMENT OF WORK

                            Statement of Work No. ___

     This Statement of Work No. ____ (this "Statement of Work"), effective as of
___________, 200__, is entered into by and between IMPCO Technologies, Inc.
("IMPCO") and Quantum Fuel Systems Technologies Worldwide, Inc. ("Quantum").
This Statement of Work is a part of and subject to the terms and conditions set
forth in the Transition Services Agreement, dated as of July 23, 2002, between
IMPCO and Quantum.

        1.       Term of Statement of Work.
                 --------------------------

        Commencing __________ and terminating ______________.

        2.       Services to be Performed.
                 -------------------------

        3.       Management Representatives.
                 ---------------------------

        4.       Fees, Costs and Expenses.
                 -------------------------

        5.       Other Provisions.
                 -----------------

<PAGE>

                                    EXHIBIT D

                                 FORM OF INVOICE
                                 ---------------

                       Transition Services Monthly Invoice
                       -----------------------------------

     This Invoice No. __ is for billing period ___________, 2001 through
___________, 2001 and relates to that certain Transition Services Agreement
dated as of July 23, 2002, by and between IMPCO Technologies, Inc., a Delaware
corporation, and Quantum Fuel Systems Technologies Worldwide, Inc., a Delaware
corporation.

A.       [Statement of Work, No. __.][Delete if inapplicable]
         [Purchase Order No. __.][Delete if inapplicable]
         Description of Applicable Project/Service:
                                                   -----------------------------

         -----------------------------------------------------------------------
         Project Site Location:
                               -------------------------------------------------
<TABLE>
<CAPTION>

---------------- ----------------- --------------- ------------------- --------------- ----------------------
Name of          No. of Hours      Employee's      Employee's          Employee's      Employee's Total
Employee         Worked by         Annualized      Pro-Rated Salary    Additional      Pro-Rated Salary
                 Employee          Salary          (Based on Number    30% Fee         Plus Fee
                 (in Hrs)          (in $)          of Hours Worked)    (in $)          (in $)
                                                   (in $)
<S>             <C>                <C>             <C>                 <C>             <C>

---------------- ----------------- --------------- ------------------- --------------- ----------------------

---------------- ----------------- --------------- ------------------- --------------- ----------------------

---------------- ----------------- --------------- ------------------- --------------- ----------------------

---------------- ----------------- --------------- ------------------- --------------- ----------------------

                                                     Sub-Total (Pro-Rated Salary Plus Fee): ________________
-------------------------------------------------------------------------------------- ----------------------
Itemized Additional Out-Of-Pocket Expenses/1/                                          Cost of Additional
                                                                                       Out-Of-Pocket
                                                                                       Expenses
                                                                                       (in $)

-------------------------------------------------------------------------------------- ----------------------

-------------------------------------------------------------------------------------- ----------------------

-------------------------------------------------------------------------------------- ----------------------

-------------------------------------------------------------------------------------------------------------

                                                   Sub-Total Addt'l Out-of-Pocket Expenses: ________________
-------------------------------------------------------------------------------------------------------------

                                                                      Total Service Charge: ________________
-------------------------------------------------------------------------------------------------------------

--------
/1/ Supporting documentation, including copies of subcontractors' invoices, are attached hereto.
</TABLE><PAGE>

                                                                    EXHIBIT 10.4

                       EMPLOYEE BENEFIT MATTERS AGREEMENT

     This EMPLOYEE BENEFIT MATTERS AGREEMENT (this "Agreement") is dated as of
July 23, 2002, by and between IMPCO Technologies, Inc., a Delaware corporation
("IMPCO") and Quantum Fuel Systems Technologies Worldwide, Inc., a Delaware
corporation ("Quantum").

     WHEREAS, in accordance with that certain Contribution and Distribution
Agreement, dated as of July 23, 2002, between IMPCO and Quantum (the
"Distribution Agreement"), IMPCO is contributing to Quantum certain assets
relating to its Automotive OEM Business as part of a restructuring of IMPCO to
separate from IMPCO all of the Automotive OEM Business;

     WHEREAS, in order to further effect the foregoing separation, the Board of
Directors of IMPCO has determined that it is appropriate, desirable and in the
best interests of IMPCO and its businesses as well as of the holders of shares
of common stock, par value $0.001 per share, of IMPCO (the "IMPCO Common
Stock"), for IMPCO to distribute to the holders of the IMPCO Common Stock all
the outstanding shares of common stock, par value $0.001 per share, of Quantum
(the "Quantum Common Stock") as set forth in the Distribution Agreement; and

     WHEREAS, IMPCO and Quantum have determined that it is necessary and
desirable to allocate and assign responsibility for certain employee benefit
matters in respect of such entities on and after the Effective Time (as defined
herein).

     NOW, THEREFORE, in consideration of the mutual promises and covenants
contained herein, IMPCO and Quantum agree as follows:

                                    ARTICLE I
                                   DEFINITIONS

     SECTION 1.1 DEFINITIONS. Capitalized terms used in this Agreement and not
defined herein shall have the meanings that such terms have in the Distribution
Agreement. As used in this Agreement, the following terms shall have the
following meanings:

     "Action" shall mean any action, suit, arbitration, inquiry, proceeding or
investigation by or before any court, any governmental or other regulatory or
administrative agency, body or commission or any arbitration tribunal.

     "Affiliate" shall mean, when used with respect to a Person, another Person
that controls, is controlled by, or is under common control (within the meaning
of Section 414(b), (c), (m) or (o) of the Code) with the Person specified.

     "Ancillary Agreements" shall mean all of the written agreements,
instruments, assignments or other written arrangements (other than this
Agreement and the Distribution Agreement) entered into in connection with the
transactions contemplated by this Agreement and the Distribution Agreement.

<PAGE>

     "Assets" shall have the meaning set forth in Section 1.1(j) of the
Distribution Agreement.

     "Board of Directors" shall mean, when used with respect to a specified
corporation, the board of directors of the corporation so specified.

     "Business Entity" shall mean any corporation, partnership, limited
liability company or other entity which may legally hold title to Assets.

     "COBRA" shall mean the Consolidated Omnibus Budget Reconciliation Act of
1985, as amended, and the regulations promulgated thereunder, including any
successor legislation.

     "Code" shall mean the Internal Revenue Code of 1986, as amended, and the
regulations promulgated thereunder, including any successor legislation.

     "Distribution" shall mean the distribution on the Distribution Date to
holders of record of shares of IMPCO Common Stock as of the Distribution Record
Date of the Quantum Common Stock owned by IMPCO on the basis of one share of
Quantum Common Stock for every outstanding share of IMPCO Common Stock.

     "Distribution Agreement" shall have the meaning set forth in the recitals
hereto.

     "Distribution Date" shall mean July 23, 2002.

     "Distribution Record Date" shall mean July 5, 2002.

     "Effective Time" shall mean 11:59 p.m. Eastern Time, on the Distribution
Date.

     "Employee Benefit Litigation Liability" shall mean, with respect to a
Business Entity a liability relating to a controversy, dispute or claim arising
out of, in connection with or in relation to the interpretation, performance,
nonperformance, validity or breach of an Employee Benefit Plan of such Business
Entity or otherwise arising out of, or in any way related to such Employee
Benefit Plan, including, without limitation, any claim based on contract, tort,
statute or constitution.

     "Employee Benefit Plans" shall mean, with respect to a Business Entity, all
"employee benefit plans" (within the meaning of Section 3(3) of ERISA),
"multiemployer plans" (within the meaning of Section 3(37) of ERISA),
retirement, pension, savings, profit-sharing, welfare, stock purchase, stock
option, equity-based, severance, employment, change-in-control, fringe benefit,
collective bargaining, bonus, incentive, deferred compensation, worker's
compensation and all other employee benefit plans, agreements, programs,
policies or other arrangements (including any funding mechanisms therefor),
whether or not subject to ERISA, whether formal or informal, oral or written,
legally binding or not, under which (i) any past, present or future employee of
the Business Entity or its Subsidiaries has a right to benefits and (ii) the
Business Entity or its Subsidiaries has (or could have) any liabilities.

     "Employee Benefit Records" shall mean all agreements, documents, books,
records or files relating to the Employee Benefit Plans of IMPCO and Quantum.

                                       2

<PAGE>

     "Employee Transfer Date" shall mean July 23, 2002.

     "Employee Welfare Benefit Plans" shall mean, with respect to a Business
Entity, all Employee Benefit Plans that are "welfare plans" within the meaning
of Section 3(1) of ERISA.

     "Employer Stock" shall mean, after the Distribution Date, Quantum Common
Stock credited to the Non-Employer Stock Accounts of a Quantum Employee and
IMPCO Common Stock credited to the Non-Employer Stock Account of an IMPCO
Retained Employee in the respective savings plan in which such employee
participates, pursuant to Section 2.4.

     "ERISA" shall mean the Employee Retirement Income Security Act of 1974, as
amended, and the regulations promulgated thereunder, including any successor
legislation.

     "Former Quantum Employee" shall mean any person employed at any time by the
IMPCO Group or the Quantum Group primarily in connection with the Quantum
Business and who is, at the Employee Transfer Date, no longer employed by the
IMPCO Group or the Quantum Group.

     "IMPCO" shall have the meaning set forth in the recitals hereto.

     "IMPCO Common Stock" shall have the meaning set forth in the recitals
hereto.

     "IMPCO Deferred Compensation Plan" shall mean the IMPCO Technologies, Inc.
Deferred Compensation Plan, as in effect from time to time.

     "IMPCO Employees" shall mean persons who, at any time prior to the Employee
Transfer Date, were employed by the IMPCO Group.

     "IMPCO Flexible Benefits Plan" shall mean the IMPCO Technologies, Inc.
Premium Only Plan, a "cafeteria plan" within the meaning of Section 125 of the
Code.

     "IMPCO Group" shall mean IMPCO (other than any member of the Quantum Group)
and each person that is a Subsidiary of IMPCO immediately prior to the Employee
Transfer Date.

     "IMPCO Nonqualified Plans" shall have the meaning set forth in Section 3.1
of this Agreement.

     "IMPCO Retained Employees" shall mean persons who, immediately after the
Employee Transfer Date, are employed by the IMPCO Group (including persons who
would otherwise be deemed to be IMPCO Retained Employees who are absent from
work by reason of disability or leave of absence and inactive employees treated
as such by agreement therewith) but shall not include any persons who are or
become Quantum Employees on or after such date.

     "IMPCO Savings Plan" shall mean the IMPCO Technologies, Inc. Investment and
Tax Savings Plan, as in effect from time to time.

     "IMPCO Stock Option" shall mean any option to purchase IMPCO Common Stock.

                                       3

<PAGE>

     "IMPCO Stock Option Plans" shall mean the 1989 Incentive Stock Option Plan,
the 1991 Executive Stock Option Plan, the 1993 Stock Option Plan for
Non-Employee Directors, the 1996 Incentive Stock Option Plan, the 1997 Incentive
Stock Option Plan, the 2000 Incentive Stock Option Plan, each as in effect at
the Effective Time, and any other stock option plan established by IMPCO or any
predecessor before the Distribution Date.

     "IMPCO Supplemental Retirement Plan" shall mean the IMPCO Technologies Inc.
Supplemental Retirement Plan, as in effect from time to time.

     "Information Statement" shall mean the Information Statement sent to the
holders of shares of IMPCO Common Stock in connection with the Distribution,
including any amendment or supplement thereto.

     "Non-Employer Stock Fund" shall have the meaning set forth in Section 2.4
of this Agreement.

     "Person" shall mean any natural person, Business Entity, corporation,
business trust, joint venture, association, company, partnership, limited
liability company, other entity or government, or any agency or political
subdivision thereof.

     "Plan Transfer Date" shall have the meaning set forth in Section 2.2(b) of
this Agreement.

     "Quantum" shall have the meaning set forth in the recitals hereto.

     "Quantum 2002 Stock Incentive Plan" shall mean the Quantum Fuel Systems
Technologies Worldwide, Inc. 2002 Stock Incentive Plan.

     "Quantum Common Stock" shall have the meaning set forth in the recitals
hereto.

     "Quantum Employees" shall mean the IMPCO Employees who, immediately after
the Employee Transfer Date, are employed by the Quantum Group (including persons
who would otherwise be deemed to be Quantum Employees who are absent from work
by reason of disability or leave of absence and inactive employees treated as
such by agreement therewith) but shall not include any persons who are or become
Quantum Employees after such date.

     "Quantum Group" shall mean Quantum and each Business Entity which is
contemplated to remain or become a Subsidiary of Quantum pursuant to the
Distribution Agreement.

     "Quantum Savings Plan" shall have the meaning set forth in Section 2.2(a)
of this Agreement.

     "Securities Act" shall mean the Securities Act of 1933, as amended.

     "Service" shall mean the U.S. Internal Revenue Service or any successor
entity thereto.

     "Subsidiary" shall mean any corporation, partnership or other entity of
which another entity (i) owns, directly or indirectly, ownership interests
sufficient to elect a majority of the

                                       4

<PAGE>

Board of Directors (or persons performing similar functions) (irrespective of
whether at the time any other class or classes of ownership interests of such
corporation, partnership or other entity shall or might have such voting power
upon the occurrence of any contingency) or (ii) is a general partner or an
entity performing similar functions (e.g., a trustee).

                                   ARTICLE II
                              COMPANY SAVINGS PLANS

     SECTION 2.1 IMPCO SAVINGS PLAN. From and after the Employee Transfer Date,
IMPCO shall continue to sponsor the IMPCO Savings Plan for the benefit of IMPCO
Retained Employees who, prior to such date, were participants thereunder. Active
participation of all Quantum Employees in the IMPCO Savings Plan shall cease
immediately prior to the Employee Transfer Date, and the trustee of such plan
shall not accept further contributions made by or on behalf of the Quantum
Employees, other than contributions that accrued prior to the Employee Transfer
Date. Except as may be required by Section 411(d)(3) of the Code or other
applicable law, nothing contained in this Article II shall have the effect of
accelerating the degree to which any individual has a vested interest in the
IMPCO Savings Plan or the Quantum Savings Plan.

     SECTION 2.2 QUANTUM SAVINGS PLAN.

     (a) As of the Employee Transfer Date, Quantum shall adopt a defined
contribution plan that is intended to qualify under Sections 401(a) and 40l(k)
of the Code (the "Quantum Savings Plan"), under which benefits shall generally
be provided for Quantum Employees. Subject to such adoption, Quantum agrees to
use its reasonable best efforts to cause the applicable fiduciaries of the
Quantum Savings Plan to accept a transfer of assets and liabilities from the
IMPCO Savings Plan, in accordance with the spin-off provisions set forth under
Section 414(l) of the Code and other applicable law, representing the full
account balances of Quantum Employees for all periods of participation in the
IMPCO Savings Plan through the Employee Transfer Date (including all
contributions and all earnings attributable thereto).

     (b) Prior to the date on which the transfer of assets and liabilities to
the Quantum Savings Plan may occur (the "Plan Transfer Date"), which date shall
occur as promptly as practicable following the Employee Transfer Date and be
subject to the fiduciaries of the Quantum Savings Plan accepting a transfer of
assets and liabilities under Section 2.2(a), IMPCO shall (i) cause the trustee
of the IMPCO Savings Plan to segregate, in accordance with the spin-off
provisions set forth under Section 414(l) of the Code and other applicable law,
the assets of the IMPCO Savings Plan representing the full account balances of
Quantum Employees for all periods of participation in the IMPCO Savings Plan
through the Employee Transfer Date (including all contributions and all earnings
attributable thereto); (ii) make all required filings and submissions to the
appropriate governmental agencies; and (iii) make all required amendments to the
IMPCO Savings Plan and related trust agreement necessary to provide for the
segregation of assets described in this Section 2.2(b).

     (c) On the Plan Transfer Date, IMPCO shall cause the trustee of the IMPCO
Savings Plan to transfer to the trustee of the Quantum Savings Plan the account
balances (inclusive of

                                       5

<PAGE>

loans) of any participating Quantum Employees, as determined under Section
2.2(b). Such transfer shall be "in kind," based on those investment funds in
which such account balances are then invested (including, but not limited to,
the employer stock funds described in Section 2.4) or in such other form as
IMPCO and Quantum may mutually agree; provided, however, that any plan loans to
Quantum Employees shall be transferred in the form of notes. In consideration of
the segregation and transfer of assets described herein, the Quantum Savings
Plan shall, as of the Plan Transfer Date, assume all liabilities attributable to
such assets. Upon the full completion of the transfer described herein, IMPCO
and the IMPCO Savings Plan shall be relieved of, and Quantum and the Quantum
Savings Plan shall assume, all liabilities for the payment of any account
balances transferred from the IMPCO Savings Plan to the Quantum Savings Plan.

     SECTION 2.3 OUTSTANDING LOANS. Subject to the fiduciaries of the Quantum
Savings Plan accepting a transfer of assets and liabilities under Section
2.2(a), with respect to any Quantum Employees who have outstanding plan loans
originally made from the IMPCO Savings Plan, such Employees shall be permitted
to repay such loans to the IMPCO Savings Plan by way of regular deductions from
their paychecks, and, prior to the Plan Transfer Date, IMPCO or Quantum (as the
case may be) shall cause all such deductions to be forwarded to the IMPCO
Savings Plan as promptly as practicable. From and after the Plan Transfer Date,
all plan loan repayments made by Quantum Employees shall be remitted exclusively
to the Quantum Savings Plan but only to the extent such plan loans are
transferred to the Quantum Savings Plan. Unless expressly contemplated by this
Agreement, in no event will the transactions contemplated by this Agreement
alter the terms of the applicable notes or the loan provisions of the Quantum
Savings Plan or the IMPCO Savings Plan.

     SECTION 2.4 EMPLOYER STOCK FUND. Effective as of the Employee Transfer
Date, an IMPCO Common Stock fund shall be added as an investment option to the
Quantum Savings Plan, and the IMPCO Savings Plan shall provide for both an IMPCO
Common Stock fund and a Quantum Common Stock fund as investment options. The
Quantum Common Stock fund in the IMPCO Savings Plan and the IMPCO Common Stock
fund in the Quantum Savings Plan are each referred to as a "Non-Employer Stock
Fund" with respect to the applicable Plan. Unless IMPCO and Quantum agree
otherwise, each Non-Employer Stock Fund shall be maintained under the respective
Plan through December 31, 2002. After such date, IMPCO and Quantum agree to
cooperate with each other with respect to the disposition of the stock when
either party decides to liquidate or otherwise terminate the Non-Employer Stock
Fund in its Savings Plan. In the absence of any agreement regarding such
liquidation, the liquidation of each Non-Employer Stock Fund shall be made in a
ratable manner over a period of twelve months. The IMPCO Savings Plan and the
Quantum Savings Plan shall each provide that, after the Distribution Date, no
new contributions may be invested in, and no amounts may be transferred from
other investment options to the Non-Employer Stock Fund under the respective
Plan (except for the distribution of Quantum Common Stock in respect of
outstanding shares of IMPCO Common Stock effected by the Distribution). To the
extent the parties determine it is necessary to preserve the tax status of the
Distribution under the Code, the IMPCO Savings Plan shall provide that no
earnings or dividends under its Non-Employer Stock Fund may be reinvested in
Quantum Common Stock and the Quantum Savings Plan shall provide that no earnings
or dividends under its Non-Employer Stock Fund may be reinvested in IMPCO Common
Stock; provided, however, this requirement shall not prohibit such earnings and

                                       6

<PAGE>

dividends from remaining in the applicable Non-Employer Stock Fund as cash or as
an amount that is invested in any non-stock investment in such fund.

     SECTION 2.5 ALLOCATION OF LIABILITIES. From and after the Employee Transfer
Date, the Quantum Savings Plan shall assume all liabilities relating to the
payment of benefits to Quantum Employees in the IMPCO Savings Plan. The IMPCO
Group shall retain all other liabilities relating to the IMPCO Savings Plan.

                                   ARTICLE III
                                 EXECUTIVE PLANS

     SECTION 3.1 IMPCO NONQUALIFIED PLANS. From and after the Effective Time,
IMPCO shall continue to sponsor the IMPCO Supplemental Retirement Plan and the
IMPCO Deferred Compensation Plan (collectively, the "IMPCO Nonqualified Plans")
for the benefit of participants thereunder. Active participation of all Quantum
Employees in the IMPCO Nonqualified Plans shall cease immediately prior to the
Employee Transfer Date, and the trustee(s) of such plans shall not accept
further contributions made by or on behalf of the Quantum Employees, other than
contributions that accrued prior to the Employee Transfer Date. The IMPCO
Nonqualified Plans shall make distributions to Quantum Employees in such manner
and at such times as required under the terms of the IMPCO Nonqualified Plans
and any applicable payment elections by participants; provided, however, at
IMPCO and Quantum's mutual election on or after the Employee Transfer Date, the
aggregate deferred account balances of those Quantum Employees in the IMPCO
Nonqualified Plans may be transferred from the IMPCO rabbi trust to the Quantum
rabbi trust. Upon the completion of such transfer of assets, Quantum shall
assume the liabilities for the payment of benefits associated with the
transferred assets with respect to the affected Quantum Employees.

     SECTION 3.2 QUANTUM NONQUALIFIED PLANS. As of the Employee Transfer Date,
Quantum shall adopt a nonqualified deferred compensation plan for the benefit of
a select group of management or highly compensated Quantum Employees. In
conjunction with adopting such plan, Quantum shall adopt a rabbi trust agreement
with terms that are substantially similar to the terms of the IMPCO rabbi trust
agreement.

                                   ARTICLE IV
                                  WELFARE PLANS

     SECTION 4.1 EMPLOYEE WELFARE BENEFIT PLANS. From and after the Effective
Time, IMPCO shall sponsor its Employee Welfare Benefit Plans for the benefit of
IMPCO Retained Employees who, prior to the Effective Time, were receiving
benefits under such plans. Active participation of all Quantum Employees in the
IMPCO Employee Welfare Benefit Plans shall cease as of 11:59 p.m. Eastern Time
on July 31, 2002. From and after such time, Quantum shall sponsor its Employee
Welfare Benefit Plans for the benefit of Quantum Employees. Notwithstanding the
foregoing, neither IMPCO nor Quantum shall have any obligation to sponsor any
specific Employee Welfare Benefit Plan from or after the Employee Transfer Date.

                                       7

<PAGE>

     SECTION 4.2 DOLLAR LIMITS. With respect to any medical and dental plan that
may be sponsored by Quantum from and after August 1, 2002, Quantum shall give
effect (subject to approval by applicable insurers), in determining any
deductible, maximum out-of-pocket limitations and annual plan maximums, to
claims incurred during 2002 prior to August 1, 2002 by Quantum Employees under
similar plans maintained by IMPCO (or any Affiliate thereof) for their benefit
immediately prior to August 1, 2002.

     SECTION 4.3 FLEXIBLE SPENDING ACCOUNTS. As of the Employee Transfer Date,
Quantum shall adopt a Code Section 125 plan for the benefit of the Quantum
Employees, the material terms of which plan shall be substantially similar to
those of the IMPCO Code Section 125 plan. Active participation of all Quantum
Employees in the IMPCO Code Section 125 plan shall cease immediately prior to
the Employee Transfer Date, and such plan shall not accept further contributions
made by or on behalf of the Quantum Employees, other than contributions that
accrued prior to the Employee Transfer Date. With respect to amounts deferred
into the IMPCO Code Section 125 plan by Quantum Employees prior to the Employee
Transfer Date, such amounts shall remain available for reimbursement of
qualified medical and dependent care expenses incurred prior to the Employee
Transfer Date for a period of time to be mutually agreed upon by IMPCO and
Quantum (the "Run-out Period"). Any claims relating to expenses incurred prior
to the Employee Transfer Date that are not submitted to IMPCO prior to the end
of the Run-out Period shall not be eligible for reimbursement. Any amounts
deferred by Quantum Employees under the IMPCO Plan that are not paid out in
connection with claims submitted prior to the end of the Run-out Period shall be
forfeited. Reimbursement for medical and dependent care expenses incurred after
the Employee Transfer Date shall be subject to the terms of the Quantum Code
Section 125 Plan.

     SECTION 4.4 ALLOCATION OF LIABILITIES.

     (a) Except to the extent welfare benefits are funded by employee
contributions, the IMPCO Group shall retain responsibility for and continue to
pay all premiums, expenses and benefits relating to the IMPCO Employee Welfare
Benefit Plans with respect to claims incurred (for self-insured plans) or
premiums due (for insured plans) (i) prior to August 1, 2002 by IMPCO Employees
(including Quantum Employees participating in such IMPCO Welfare Benefit Plans
prior to August 1, 2002) as well as their covered dependents and (ii) from and
after August 1, 2002, by IMPCO Retained Employees as well as their covered
dependents.

     (b) Except to the extent welfare benefits are funded by employee
contributions, the Quantum Group shall assume responsibility for and pay all
premiums, expenses and benefits relating to the Quantum Group Employee Welfare
Benefit Plans with respect to claims incurred (for self-insured plans) or
premiums due (for insured plans) from and after August 1, 2002 by Quantum
Employees as well as their covered dependents.

     (c) For the purposes of this Section 4.4, a claim is deemed incurred when
the services that are the subject of the claim are performed; in the case of
life insurance, when the death occurs; in the case of long-term disability, when
the disability occurs; and, in the case of a hospital stay, when the employee
first enters the hospital. Notwithstanding the foregoing, claims incurred by any
employee of a pre-Distribution Subsidiary of IMPCO or their covered dependents
under any Employee Welfare Benefit Plan maintained by such Subsidiary solely for

                                       8

<PAGE>

the benefit of its employees and their dependents shall, whether incurred prior
to, on or after August 1, 2002, be the sole responsibility and liability of that
Subsidiary.

     (d) The IMPCO Group shall be responsible for making COBRA coverage
available with respect to any IMPCO Employees and Quantum Employees (and their
covered dependents) who experience a "qualifying event" on or before August 1,
2002, including without limitation any such event arising from the transactions
contemplated in this Agreement. The Quantum Group shall be responsible for
making COBRA coverage available with respect to the Quantum Employees (and their
covered dependents) under any applicable Quantum Employee Benefit Plans
subsequent to August 1, 2002. Notwithstanding the foregoing, a pre-Distribution
Subsidiary of IMPCO shall be responsible for all COBRA coverage for its former
employees and covered dependents who participated in a plan maintained solely
for their benefit whether the applicable event occurs prior to, on or after
August 1, 2002.

                                    ARTICLE V
                               EQUITY-BASED PLANS

     SECTION 5.1 IMPCO STOCK OPTIONS. IMPCO Stock Options shall be treated as
follows:

     (a) As of the Distribution Date, each IMPCO Stock Option outstanding as of
the Distribution Record Date and not exercised prior to the Distribution Date
(each an "IMPCO Option") shall be adjusted as set forth in this Section 5.1.
Each IMPCO Option shall be converted (an "Adjusted Option"), as of the
Distribution Date, into two options: an option (the "IMPCO Adjusted Option") to
purchase the same number of shares of IMPCO Common Stock covered by the IMPCO
Option and as to which the IMPCO Option has not been exercised as of the
Distribution Date ("IMPCO Option Number") and an option (the "Quantum Option")
to purchase a number of shares of Quantum Common Stock equal to the IMPCO Option
Number times a fraction, the numerator of which is the total number of shares of
Quantum Common Stock distributed to IMPCO stockholders in the Distribution and
the denominator of which is the total number of shares of IMPCO Common Stock
outstanding on Distribution Record Date (the "Distribution Ratio"). The terms of
the IMPCO Adjusted Option and the Quantum Option (other than the exercise price
and the number of shares) shall be substantially the same as the IMPCO Option.

     (b) The exercise prices per share for each IMPCO Adjusted Option and the
Quantum Option shall be established, as set forth in Schedule 5.1(b) hereto, in
a manner so that: (a) the aggregate "intrinsic value" (i.e. the market value of
the stock underlying the option, less the exercise price of such option,
multiplied by the number of shares then covered by such option) after the
Distribution of the IMPCO Adjusted Option plus the Quantum Option is not greater
than the intrinsic value of the related IMPCO Option immediately prior to the
Distribution, and (b) the ratio of the exercise price per option to the market
value per share after the Distribution is not lower than the ratio of the
exercise price of the IMPCO Option to the market value per share of IMPCO Common
Stock immediately prior to the Distribution. The determination of the exercise
prices for each IMPCO Adjusted Option and Quantum Option shall be made by IMPCO
as advised by its professional advisors.

                                       9

<PAGE>

     (c) The Quantum Options to be granted with respect to each Adjusted Option
shall be issued under the Quantum 2002 Stock Incentive Plan, and Quantum shall
take all corporate action and make all required filings under applicable state
blue sky laws and the Securities Act to (i) issue the Quantum Options required
under this Section 5.1 and (ii) to register or qualify the Quantum Options
and/or the underlying shares of Quantum Common Stock so that the shares of
Quantum Common Stock acquired upon exercise of each Quantum Option are freely
tradable under the Securities Act (except for shares acquired by Affiliates of
Quantum) and each applicable state's blue sky laws.

     (d) Exceptions. The Board of Directors of IMPCO may determine that certain
IMPCO Stock Options described above may not be adjusted as described above, but
instead shall be subject to such conditions as the Board of Directors of IMPCO
(or the compensation committee thereof) shall determine to the extent necessary
to avoid adverse tax consequences to option holders who are not U.S. residents.

     (e) IMPCO and Quantum acknowledge that the adjustment to IMPCO Options
under this Article V will be implemented in part by the issuance of the Quantum
Options under the terms of the Quantum 2002 Stock Incentive Plan.

     (f) After the Distribution Date, (i) IMPCO Options, regardless of by whom
held, shall be settled by IMPCO pursuant to the terms of the applicable IMPCO
Stock Option Plan, and (ii) Quantum Options, regardless of by whom held, shall
be settled by Quantum pursuant to the terms of the Quantum 2002 Stock Incentive
Plan.

     SECTION 5.2 ALLOCATION OF LIABILITIES. Except as provided in Article V of
the Tax Allocation and Indemnification Agreement, (a) the Quantum Group shall
assume all liabilities with respect to awards granted pursuant to the Quantum
2002 Stock Incentive Plan, and (b) the IMPCO Group shall retain all other
liabilities with respect to awards granted pursuant to the IMPCO Stock Option
Plans (including, but not limited to, awards granted to IMPCO Retained
Employees).

                                   ARTICLE VI
                          OTHER EMPLOYEE BENEFIT ISSUES

     SECTION 6.1 EMPLOYEE BENEFIT LITIGATION LIABILITIES.

     (a) Except as otherwise expressly provided in Section 6.1(b) below or
otherwise in this Agreement, the Quantum Group shall assume all Employee Benefit
Litigation Liabilities that are asserted by Quantum Employees and all employees
of Quantum following the Effective Time, and the IMPCO Group shall retain all
Employee Benefit Litigation Liabilities that are asserted by all other IMPCO
Employees.

     (b) With respect to any Former Quantum Employee, the IMPCO Group shall
assume and be liable for any Employee Benefit Litigation Liabilities asserted by
Former Quantum Employees arising from or in connection with the IMPCO
Nonqualified Plans, the IMPCO Savings Plan and the IMPCO Stock Option Plans, and
the Quantum Group shall assume and be

                                       10

<PAGE>

liable for all other Employee Benefit Litigation Liabilities asserted by Former
Quantum Employees.

     SECTION 6.2 WORKERS' COMPENSATION. The IMPCO Group shall retain all
liabilities relating to, arising out of, or resulting from workers' compensation
claims that were incurred (a) prior to the Effective Time with respect to IMPCO
Employees (not including any Quantum Employees) and (b) on and after the
Effective Time with respect to IMPCO Retained Employees. The Quantum Group shall
retain all liabilities relating to workers' compensation claims that were
incurred (a) prior to the Effective Time with respect to Quantum Employees and
(b) on and after the Effective Time with respect to Quantum Employees. For
purposes of this paragraph, a claim is deemed incurred upon the occurrence of
the event giving rise to eligibility for workers' compensation benefits or upon
an occupational disease becoming manifest, as the case may be.

     SECTION 6.3 PAYROLL TAXES AND REPORTING OF COMPENSATION. IMPCO, Quantum and
their respective Affiliates agree to take such action as may be reasonably
necessary or appropriate to minimize liabilities related to the payroll tax
payments of IMPCO, Quantum and each Affiliate after the Effective Time,
including without limitation those actions which are consistent with the
treatment of Quantum as a successor employer under Treas. Reg. ss.
31.3121(a)(1)-1(b). IMPCO, Quantum and each Affiliate shall bear its own
responsibility for payroll tax obligations and for the proper reporting to the
appropriate government authorities of compensation earned by their respective
employees after the Effective Time, including, subject to Article V of the Tax
Allocation and Indemnification Agreement, compensation related to the exercise
of stock options.

                                   ARTICLE VII
                           BENEFIT PLAN PARTICIPATION

     SECTION 7.1 IMPCO PLANS. Notwithstanding any provision of this Agreement to
the contrary, unless otherwise provided herein, effective as of the Effective
Time, all Quantum Employees shall cease participation in all IMPCO Employee
Benefit Plans and the Quantum Group shall cease to be a "participating employer"
in any of the IMPCO Benefit Plans.

     SECTION 7.2 QUANTUM PLANS. (a) With respect to any newly created Employee
Benefit Plan sponsored by the Quantum Group after the Employee Transfer Date or
the Effective Time, whichever is applicable, the Quantum Group shall cause to be
recognized (to the extent applicable) each Quantum Employee's (i) past service
with the IMPCO Group to the extent recognized under similar plans maintained by
the IMPCO Group immediately prior to the relevant date and (ii) accrued but
unused vacation time and sick days, and (b) any Quantum Employee who
participated in an IMPCO Employee Benefit Plan immediately prior to the relevant
date shall be entitled to immediate participation in any substantially similar
Employee Benefit Plan sponsored by the Quantum Group.

     SECTION 7.3 SUBSEQUENT EMPLOYER. If, during the one-year period following
the Effective Time, an IMPCO Retained Employee or a Quantum Employee terminates
employment with his or her employer and then immediately commences employment

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<PAGE>

with the Quantum Group or the IMPCO Group, respectively, the subsequent employer
shall cause to be recognized (to the extent applicable) such employee's past
service with the Quantum Group or the IMPCO Group to the extent recognized under
any substantially similar plans maintained by the prior employer.

     SECTION 7.4 RIGHT TO AMEND OR TERMINATE. Except as specifically provided
herein, nothing in this Agreement shall be construed or interpreted to restrict
the IMPCO Group's or the Quantum Group's right or authority to amend or
terminate any of their Employee Benefit Plans following the Effective Time.

                                  ARTICLE VIII
                              ACCESS TO INFORMATION

     SECTION 8.1 ACCESS TO INFORMATION. Article IV of the Distribution Agreement
shall govern the rights of the IMPCO Group and the Quantum Group with respect to
access to information. The term "Records" in that Article shall be read to
include all records related to eligibility and benefits information for and the
administration of the IMPCO and Quantum Employee Benefit Plans.

                                   ARTICLE IX
                                 INDEMNIFICATION

     SECTION 9.1 INDEMNIFICATION. Except to the extent inconsistent with Article
V of the Tax Allocation and Indemnification Agreement, Article III of the
Distribution Agreement shall govern the rights of the IMPCO Group and the
Quantum Group with respect to indemnification. The term "IMPCO Liabilities" in
that Article shall be read to include all liabilities assumed or retained by the
IMPCO Group pursuant to this Agreement. The term "Quantum Liabilities" in that
Article shall be read to include all liabilities assumed or retained by the
Quantum Group pursuant to this Agreement.

                                    ARTICLE X
                               DISPUTE RESOLUTION

     SECTION 10.1 DISPUTE RESOLUTION. Article VII of the Distribution Agreement
shall govern the rights of the IMPCO Group and the Quantum Group with respect to
dispute resolution.

                                   ARTICLE XI
                                  MISCELLANEOUS

     SECTION 11.1 COMPLETE AGREEMENT; CONSTRUCTION. This Agreement, including
the Exhibits and Schedules (if any), and the Distribution Agreement and
Ancillary Agreements shall constitute the entire agreement between the parties
with respect to the subject matter hereof and shall supersede all previous
negotiations, commitments and

                                       12

<PAGE>

writings with respect to such subject matter. In the event of any inconsistency
between this Agreement and any Schedule hereto, the Schedule shall prevail.

     SECTION 11.2 ANCILLARY AGREEMENTS. This Agreement is not intended to
address, and should not be interpreted to address, the matters specifically and
expressly covered by the Ancillary Agreements.

     SECTION 11.3 COUNTERPARTS. This Agreement may be executed in one or more
counterparts, all of which shall be considered one and the same agreement, and
shall become effective when one or more such counterparts have been signed by
each of the parties and delivered to the other parties.

     SECTION 11.4 SURVIVAL OF AGREEMENTS. Except as otherwise contemplated by
this Agreement, all covenants and agreements of the parties contained in this
Agreement shall survive the Distribution Date.

     SECTION 11.5 EXPENSES. Except as otherwise set forth in this Agreement, all
costs and expenses in connection with the preparation, execution, delivery and
required implementation of this Agreement shall be charged to and paid by the
parties in accordance with Section 9.5 of the Distribution Agreement.

     SECTION 11.6 NOTICES. All notices and other communications hereunder shall
be in writing and hand delivered or mailed by registered or certified mail
(return receipt requested) to the parties at the following addresses (or at such
other addresses for a party as shall be specified by like notice) and will be
deemed given on the date on which such notice is received, as evidenced by
written receipt, acknowledgement or other evidence of actual receipt:

     if to IMPCO, to:

          IMPCO Technologies, Inc.
          16804 Gridley Place
          Cerritos, CA 90703
          Telecopy: (562) 924-8069
          Attn: Chief Financial Officer

     with a copy to:

          Morrison & Foerster LLP
          555 West Fifth Street
          Los Angeles, CA 90013
          Telecopy: (213) 892-5641
          Attn: Johnathan F. Atzen, Esq.

                                       13

<PAGE>

     if to Quantum, to:

          Quantum Fuel Systems Technologies Worldwide, Inc.
          17872 Cartwright Road
          Irvine, CA 92614
          Telecopy: (949) 474-3086
          Attn:  President

     SECTION 11.7 WAIVERS. The failure of any party to require strict
performance by any other party of any provision in this Agreement will not waive
or diminish that party's right to demand strict performance thereafter of that
or any other provision hereof.

     SECTION 11.8 AMENDMENTS. Subject to the terms of Section 11.11 hereof, this
Agreement may not be modified or amended except by an agreement in writing
signed by each of the parties hereto.

     SECTION 11.9 ASSIGNMENT. This Agreement shall not be assignable, in whole
or in part, directly or indirectly, by operation of law or otherwise, by any
party hereto without the prior written consent of the other parties hereto, and
any attempt to assign any rights or obligations arising under this Agreement
without such consent shall be void.

     SECTION 11.10 SUCCESSORS AND ASSIGNS. The provisions to this Agreement
shall be binding upon, inure to the benefit of and be enforceable by the parties
and their respective successors and permitted assigns.

     SECTION 11.11 TERMINATION. This Agreement may be terminated and may be
amended, modified or abandoned at any time prior to the Distribution by and in
the sole discretion of IMPCO without the approval of the shareholders of IMPCO.
In the event of such termination, no party shall have any liability of any kind
to any other party or any other person. After the Distribution, this Agreement
may not be terminated except by an agreement in writing signed by the parties.

     SECTION 11.12 SUBSIDIARIES. Each of the parties hereto shall cause to be
performed, and hereby guarantees the performance of, all actions, agreements and
obligations set forth herein to be performed by any Subsidiary of such party or
by any entity that is contemplated to be a Subsidiary of such party on and after
the Distribution Date.

     SECTION 11.13 THIRD PARTY BENEFICIARIES. This Agreement is solely for the
benefit of the parties hereto and their respective Subsidiaries and Affiliates
and shall not be deemed to confer upon third parties any remedy, claim,
liability, reimbursement, claim of action, accelerated entitlement to any
compensation or benefit, or other right.

     SECTION 11.14 FIDUCIARY MATTERS; CONSENT OF THIRD PARTIES. IMPCO and
Quantum each acknowledge that actions required to be taken pursuant to this
Agreement may be subject to fiduciary duties or standards of conduct under ERISA
or other applicable law, and no party shall be deemed to be in violation of this
Agreement if it fails to comply with any provisions hereof based upon its good
faith determination that to do so would

                                       14

<PAGE>

violate such a fiduciary duty or standard. If any provision of this Agreement is
dependent on the consent of any third party and such consent is withheld, IMPCO
and Quantum shall use their reasonable best efforts to implement the applicable
provisions of this Agreement to the full extent practicable. If any provision of
this Agreement cannot be implemented due to the failure of such third party to
consent, IMPCO and Quantum shall negotiate in good faith to implement the
provision in a mutually satisfactory manner.

     SECTION 11.15 TITLE AND HEADINGS. Titles and headings to sections herein
are inserted for the convenience of reference only and are not intended to be a
part of or to affect the meaning or interpretation of this Agreement.

     SECTION 11.16 EXHIBITS AND SCHEDULES. The Exhibits and Schedules, if any,
shall be construed with and as an integral part of this Agreement to the same
extent as if the same had been set forth verbatim herein.

     SECTION 11.17 GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF CALIFORNIA APPLICABLE TO
CONTRACTS MADE AND TO BE PERFORMED IN THE STATE OF CALIFORNIA.

     SECTION 11.18 CONSENT TO JURISDICTION. Without limiting the provisions of
Article X hereof, each of the parties irrevocably submits to the exclusive
jurisdiction of (a) the Superior Court of the State of California, Los Angeles
County, and (b) the United States District Court for the Central District of
California, for the purposes of any suit, action or other proceeding arising out
of this Agreement or any transaction contemplated hereby. Each of the parties
agrees to commence any action, suit or proceeding relating hereto either in the
United States District Court for the Central District of California or if such
suit, action or other proceeding may not be brought in such court for
jurisdictional reasons, in the Superior Court of the State of California, Los
Angeles County. Each of the parties further agrees that service of any process,
summons, notice or document by U.S. registered mail to such party's respective
address set forth above shall be effective service of process for any action,
suit or proceeding in California with respect to any matters to which it has
submitted to jurisdiction in this Section 11.18. Each of the parties irrevocably
and unconditionally waives any objection to the laying of venue of any action,
suit or proceeding arising out of this Agreement or the transactions
contemplated hereby in (i) Superior Court of the State of California, Los
Angeles County, or (ii) the United States District Court for the Central
District of California, and hereby further irrevocably and unconditionally
waives and agrees not to plead or claim in any such court that any such action,
suit or proceeding brought in any such court has been brought in an inconvenient
forum.

     SECTION 11.19 SEVERABILITY. In the event any one or more of the provisions
contained in this Agreement should be held invalid, illegal or unenforceable in
any respect, the validity, legality and enforceability of the remaining
provisions contained herein and therein shall not in any way be affected or
impaired thereby. The parties shall endeavor in good-faith negotiations to
replace the invalid, illegal or unenforceable provisions with valid provisions,
the economic effect of which comes as close as possible to that of the invalid,
illegal or unenforceable provisions.

                                       15

<PAGE>

     SECTION 11.20 GOVERNMENTAL NOTICES; COOPERATION. Notwithstanding anything
in this Agreement to the contrary, all actions contemplated herein with respect
to Employee Benefit Plans which are to be consummated pursuant to this Agreement
shall be subject to such notices to, and/or approvals by, the Service (or any
other governmental agency or entity) as are required or deemed appropriate by
such Employee Benefit Plan's sponsor. Each of IMPCO and Quantum agrees to use
its commercially reasonable efforts to cause all such notices and/or approvals
to be filed or obtained, as the case may be. Each party hereto shall reasonably
cooperate with the other parties with respect to any government filings,
employee notices or any other actions reasonably necessary to maintain and
implement the Employee Benefit Plans covered by this Agreement.

     SECTION 11.21 FURTHER ASSURANCES. From time to time, as and when reasonably
requested by any other party hereto, each party hereto shall execute and
deliver, or cause to be executed and delivered, all such documents and
instruments and shall take, or cause to be taken, all such further or other
actions as such other party may reasonably deem necessary or desirable to effect
the purposes of this Agreement and the transactions contemplated hereunder.

     IN WITNESS WHEREOF, the parties have duly executed and entered into this
Agreement, as of the date first above written.

                                IMPCO TECHNOLOGIES, INC.

                                By:   /s/ Robert M. Stemmler
                                   ---------------------------------------------
                                   Name:  Robert M. Stemmler
                                   Title: President and Chief Executive Officer

                                QUANTUM FUEL SYSTEMS
                                TECHNOLOGIES WORLDWIDE, INC.

                                By:  /s/ Alan P. Niedzwiecki
                                   --------------------------------------------
                                   Name:  Alan P. Niedzwiecki
                                   Title: President and Chief Operating Officer

                                       16

<PAGE>

                                 Schedule 5.1(b)

The exercise prices for each IMPCO Adjusted Option and Quantum Option will be
determined as follows:

     1. Calculate the aggregate intrinsic value of the IMPCO Option immediately
prior to the Distribution and determine the ratio of the exercise price for the
IMPCO Option to the market value of IMPCO Common Stock immediately prior to the
Distribution (the "Pre-Distribution Exercise Price to Market Price Ratio").

     2. Calculate the preliminary IMPCO Adjusted Option exercise price by
dividing (x) the market value of IMPCO Common Stock (without Quantum)
immediately after the Distribution by (y) the sum of (i) the market value of
IMPCO Common Stock immediately after the Distribution and (ii) the market value
of Quantum Common Stock immediately after the Distribution multiplied by the
Distribution Ratio, and multiplying the result by the exercise price for the
IMPCO Option.

     3. Divide the preliminary IMPCO Adjusted Option exercise price by the
market value of IMPCO Common Stock immediately after the Distribution to
determine the "IMPCO Adjusted Exercise Price to Market Price Ratio." If the
IMPCO Adjusted Exercise Price to Market Price Ratio is less than the
Pre-Distribution Exercise Price to Market Price Ratio, increase the preliminary
IMPCO Adjusted Option exercise price to align the IMPCO Adjusted Exercise Price
to Market Ratio with the Pre-Distribution Exercise Price to Market Price Ratio
in order to determine the final Adjusted IMPCO Option exercise price.

     4. Calculate the preliminary Quantum Option exercise price by multiplying
the exercise price for the IMPCO Option by the result obtained by dividing (z)
one minus the fraction calculated in paragraph 2 above by (w) the Distribution
Ratio.

     5. Divide the preliminary Quantum Option exercise price by the market value
of Quantum Common Stock immediately after the Distribution to determine the
"Quantum Adjusted Exercise Price to Market Price Ratio." If the Quantum Adjusted
Exercise Price to Market Ratio is less than the Pre-Distribution Exercise Price
to Market Price Ratio, increase the preliminary Quantum Option exercise price to
align the Quantum Adjusted Exercise Price to Market Price Ratio with the
Pre-Distribution Exercise Price to Market Price Ratio in order to determine the
final Quantum Option exercise price.

     6. Add the aggregate intrinsic values of the Adjusted IMPCO Option and
Quantum Option and compare the sum to the aggregate intrinsic value calculated
in paragraph 1 above and make final adjustments, if necessary, so that the
aggregate intrinsic values of the Adjusted IMPCO Option and Quantum Option do
not exceed the original aggregate intrinsic value of the IMPCO Option.

                                       17

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