Document:

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                                                                   EXHIBIT 10.59

                 THIRD AMENDMENT TO FOURTH AMENDED AND RESTATED
               REVOLVING CREDIT, TERM LOAN AND SECURITY AGREEMENT

          This third Amendment to Fourth Amended and Restated Revolving Credit,
Term Loan and Security Agreement (the "Amendment") is made this 1/st/ day of
August, 2003, by and among WinCup Holdings, Inc., Radnor Chemical Corporation,
StyroChem U.S., Ltd., Radnor Holdings Corporation, Radnor Delaware II, Inc.,
StyroChem Delaware, Inc., WinCup Texas, Ltd., StyroChem GP, L.L.C., StyroChem
LP, L.L.C., WinCup GP, L.L.C., and WinCup LP, L.L.C. (each individually a
"Borrower" and collectively, "Borrowers"), and PNC Bank, National Association
("PNC"), as Lead Arranger and Administrative Agent, Fleet Capital Corporation
("Fleet"), as Documentation Agent and Lenders (defined below).

                                   BACKGROUND

          A.   On December 26, 2001, Borrowers, the financial institutions which
are now or which hereafter become a party hereto (individually, a "Lender" and
collectively, the "Lenders"), and PNC, as agent for Lenders (PNC in such
capacity, the "Agent") entered into a certain Fourth Amended and Restated
Revolving Credit and Security Agreement (as amended, modified, renewed,
extended, replaced or substituted from time to time, the "Loan Agreement") to
reflect certain financing arrangements between the parties thereto. The Loan
Agreement and all other documents executed in connection therewith are
collectively referred to as the "Existing Financing Agreements." All capitalized
terms not otherwise defined herein shall have the meaning ascribed thereto in
the Loan Agreement. In the case of a direct conflict between the provisions of
the Loan Agreement and the provisions of this Amendment, the provisions hereof
shall prevail.

          B.   Borrowers and Agent modified certain definitions, terms and
conditions contained in the Loan Agreement pursuant to that (i) certain First
Amendment to Revolving Credit and Security Agreement dated February 4, 2002 to
facilitate the execution of a Commitment Transfer Supplement by and between
Lenders and Fleet Capital Corporation, (ii) certain Letter Agreement, dated as
of March 21, 2002, among Borrowers, Agent and Lenders, and (iii) certain Second
Amendment to Revolving Credit and Security Agreement dated March 5, 2003.

          C.   The Borrowers have requested and the Agent has agreed to modify
certain definitions, terms and conditions in the Loan Agreement as provided
herein.

          D.   The parties have agreed, subject to the terms and conditions of
this Amendment, to modify and amend the Existing Financing Agreements.

     NOW THEREFORE, with the foregoing background hereinafter deemed
incorporated by reference herein and made part hereof, the parties hereto,
intending to be legally bound, promise and agree as follows:

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     1. Section I of the Loan Agreement shall be amended as follows:

          (a)   There shall be added to Section I of the Loan Agreement the
following definitions:

               "Stone Mountain Availability" shall mean seventy percent (70%) of
               the fair market value of the Stone Mountain Property as set forth
               in the Stone Mountain Appraisal during the period from the date
               of this Amendment through January 31, 2004; provided that, the
               Stone Mountain Availability shall be (x) reduced by any proceeds
               received by Borrowers from the sale outside the ordinary course
               of any of Borrowers' business assets and (y) terminated upon the
               earlier of a refinancing of the Stone Mountain Property or
               January 31, 2004.

               "Stone Mountain Mortgage" shall mean the mortgage on the Stone
               Mountain Property together with all extensions, renewals
               amendments, supplements, modifications, substitutions and
               replacements thereto and thereof.

               "Stone Mountain Property" shall mean that certain real property
               owned by WinCup Holdings, Inc. generally known as 4600, 4616,
               4640 and 4680 Lewis Road, Stone Mountain, DeKalb County, Georgia
               30083, as more particularly described in the Stone Mountain
               Mortgage.

               "Stone Mountain Property Appraisal" shall mean that certain
               appraisal of the Stone Mountain Property prepared by Cushman and
               Wakefield and dated February 7, 2003 and February 12, 2003.

          (a)  The following definitions shall be deleted in their entirety and
replaced as follows:

          "Applicable Margin" for any period shall be determined by the Fixed
          Charge Coverage Ratio of Radnor on a Consolidated Basis calculated for
          the most recent fiscal quarter with respect to the four fiscal
          quarters then ended (except calculated for the quarters ended
          September 30, 2003, December 31, 2003 and March 31, 2004 as set forth
          in Section 6.5 hereof) which shall be increased or decreased from time
          to time, as the case may be, so long as no Default or Event of Default
          shall have occurred and be continuing, as of the first day of each
          fiscal quarter following the fiscal quarter reported upon in the
          financial statements delivered pursuant to Sections 9.7 and 9.8
          hereof. The Applicable Margin with respect to Eurodollar Rate Loans
          shall be the percentage set forth below as corresponds to the
          applicable ratio set forth below:

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          Fixed Charge Coverage Ratio       Revolving          Term Loan
          ---------------------------       Advances           Eurodollar
                                            Eurodollar         Rate Margin
                                            Rate Margin        -----------
                                            -----------

          Less than 1.15:1                  2.75%              3.00%
          1.15:1 to 1.49:1                  2.50%              2.75%
          1.50:1 to 1.74:1                  2.25%              2.50%
          1.75:1 or greater                 2.00%              2.25%

               "Collateral" shall mean and include:

                    (a) all Receivables;

                    (b) all Equipment (excluding Equipment as set forth in
                    Schedule 1.1);

                    (c) all General Intangibles;

                    (d) all Inventory;

                    (e) all Investment Property (excluding the stock or other
                    ownership interests of any Subsidiary of Radnor or any other
                    Borrower);

                    (f) all Mortgaged Property and the Stone Mountain Property;

                    (g) all of each Borrower's right, title and interest in and
                    to (i) its respective goods and other property including,
                    but not limited to, all merchandise returned or rejected by
                    Customers, relating to or securing any of the Receivables;
                    (ii) all of each Borrower's rights as a consignor, a
                    consignee, an unpaid vendor, mechanic, artisan, or other
                    lienor, including stoppage in transit, setoff, detinue,
                    replevin, reclamation and repurchase; (iii) all additional
                    amounts due to any Borrower from any Customer relating to
                    the Receivables; (iv) other property, including warranty
                    claims, relating to any goods securing this Agreement; (v)
                    all of each Borrower's contract rights, rights of payment
                    which have been earned under a contract right, instruments
                    (including promissory notes), documents, chattel paper
                    (including electronic chattel paper), warehouse receipts,
                    deposit accounts, letters of credit, and money; (vi) all
                    commercial tort claims (whether now existing or hereafter
                    arising); and (vii) if and when obtained by any Borrower,
                    all real and personal property of third parties in which
                    such Borrower has been granted a lien or security interest
                    as security for the payment or enforcement of Receivables;

                                       3

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                    (h) all of each Borrower's ledger sheets, ledger cards,
                    files, correspondence, records, books of account, business
                    papers, computers, computer software (owned by any Borrower
                    or in which it has an interest), computer programs, tapes,
                    disks and documents relating to (a), (b), (c), (d), (e), (f)
                    or (g) of this Paragraph; and

                    (i) all proceeds and products of (a), (b), (c), (d), (e),
                    (f), (g) or (h) in whatever form, including, but not limited
                    to: cash, deposit accounts (whether or not comprised solely
                    of proceeds), certificates of deposit, insurance proceeds
                    (including hazard, flood and credit insurance), negotiable
                    instruments and other instruments for the payment of money,
                    chattel paper, security agreements, documents, eminent
                    domain proceeds, condemnation proceeds and tort claim
                    proceeds.

     2.   Section II of the Loan Agreement shall be amended as follows:

          (a)  Section 2.1(a) shall be deleted in its entirety and replaced as
follows:

               2.1  Revolving Advances.

                    (a)   Subject to the terms and conditions set forth in this
                    Agreement, including, without limitation, Section 2.1(b),
                    each Lender, severally and not jointly, agrees to make
                    Revolving Advances to Borrowers in accordance with the
                    procedures provided for herein in an aggregate amount
                    outstanding at any time not greater than such Lender's
                    Commitment Percentage of the Borrowing Base (as defined
                    below) minus the undrawn or unreimbursed amount of
                    outstanding Letters of Credit unless Borrowers have
                    deposited with Agent cash collateral in such amounts and in
                    accordance with Section 3.2. For purposes hereof, "Borrowing
                    Base" shall mean the lesser of (x) the Maximum Revolving
                    Advance Amount or (y) the sum of:

                    (i)   up to 85%, subject to the provisions of Section 2.1(b)
                    hereof ("Receivables Advance Rate"), of Eligible
                    Receivables, plus

                    (ii)  the lesser of (x) $1,000,000 or (y) up to 85%, subject
                    to the provisions of 2.1(b) hereof ("Canadian Receivables
                    Advance Rate"), of Eligible Canadian Receivables, plus

                    (iii) the lesser of (x) $25,000,000 or (y) up to 60%,
                    subject to the provisions of Section 2.1(b) hereof
                    ("Inventory Advance Rate"), of Eligible Inventory of
                    Borrowers (the Receivables Advance Rate, the Canadian
                    Receivables Advance Rate and the Inventory Advance Rate
                    shall be referred to, collectively, as the "Advance Rates"),
                    plus,

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                    (iv) the Stone Mountain Availability, minus,

                    (v) such reserves as Agent may, in a commercially reasonable
                    manner, reasonably deem proper and necessary.

               The amount derived from the sum of Sections 2.1(a)(y)(i), (ii),
               (iii) and (iv) minus (v) at any time and from time to time shall
               be referred to as the "Formula Amount". The Revolving Advances
               shall be evidenced by one or more secured promissory notes
               (collectively, the "Revolving Credit Note") substantially in the
               form attached hereto as Exhibit 2.1(a).

     3.   Section VI of the Loan Agreement shall be amended as follows:

          (a)  Section 6.5 of the Loan Agreement shall be deleted in its
entirety and replaced as follows:

               6.5. Fixed Charge Coverage Ratio for Radnor on a Consolidated
               Basis. Cause to be maintained a Fixed Charge Coverage Ratio for
               Radnor on a Consolidated Basis to be calculated at the end of
               each fiscal quarter based the most recent four quarters for the
               quarter ended June 30, 2003, based on a single quarter for the
               quarter ended September 30, 2003, based on two quarters for the
               quarter ended December 31, 2003, based on three quarters for the
               quarter ended March 31, 2004 and thereafter based on the most
               recent four fiscal quarters then ended (for purposes of
               calculating the Fixed Charge Coverage Ratio for quarters ending
               on or before June 30, 2004, the amount of interest expense
               attributable to the Senior Notes and the Second Senior Notes
               shall be equal to one-quarter of the annual interest expense for
               each quarter included in the test period) equal to or greater
               than the amounts set forth below for the periods set forth below:

                   Period                            Fixed Charge Coverage Ratio
                   ------                            ---------------------------

                   June 30, 2003                              0.70 to 1;
                   September 30, 2003                         0.90 to 1;
                   December 31, 2003                          1.10 to 1;
                   March 31, 2004                             1.00 to 1;
                   June 30, 2004                              1.05 to 1; and
                   September 30, 2004 and thereafter          1.15 to 1.

          (b)  Section 6.6 shall be deleted in its entirety and replaced as
follows:

               6.6. Funded Debt to EBITDA Ratio. Cause to be maintained a Funded
               Debt to EBITDA Ratio for Radnor on a Consolidated Basis to be
               calculated at the end of each fiscal quarter based on a single
               quarter for the quarter ended September 30, 2003, based on two
               quarters for the quarter ended December 31, 2003, based on three
               quarters for the quarter ended March 31, 2004 and thereafter
               based on the most recent four fiscal quarters then ended (using
               an annualized calculation of EBITDA for quarters

                                       5

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               ending on or before June 30, 2004) not greater than the amounts
               set forth below for the periods set forth below:

                    Period                                      Funded Debt to
                    ------                                      --------------
                                                                EBITDA Ratio
                                                                ------------
                    June 30, 2003                               6.60 to 1;
                    September 30, 2003                          6.00 to 1;
                    December 31, 2003                           5.00 to 1;
                    March 31, 2004                              5.50 to 1;
                    June 30, 2004                               5.25 to 1;
                    September 30, 2004 and
                    December 31, 2004                           4.50 to 1;
                    March 31, 2005 and each
                    quarter through September 30, 2005          4.25 to 1; and
                    December 31, 2005 and each
                    quarter thereafter                          3.75 to 1.

     4.   Section 7 of the Loan Agreement shall be amended as follows:

     5.   (a)  Section 7.2 shall be deleted in its entirety and replaced as
follows:

               7.2 Creation of Liens. Create or suffer to exist any Lien or
               transfer upon or against any of its property or assets now owned
               or hereafter acquired, except Permitted Encumbrances and except
               that notwithstanding Section 7.8 hereof and this Section 7.2,
               WinCup shall be permitted to refinance the Stone Mountain
               Property and may place a Lien on the Stone Mountain Property to
               secure such refinancing indebtedness. The Agent and the Lenders
               agree to release the Stone Mountain Mortgage at the time of such
               refinancing; provided that, the Stone Mountain Availability is
               terminated upon such release and no Event of Default exists.

     6.   Representations and Warranties. Each Borrower hereby:

          (a)  reaffirms all representations and warranties made to Agent and
Lenders under the Agreement and all of the other Existing Financing Agreements
and confirms that all are true and correct as of the date hereof;

          (b)  reaffirms all of the covenants contained in the Agreement and
covenants to abide thereby until all Advances, Obligations and other liabilities
of Borrowers to Agent and Lenders, of whatever nature and whenever incurred, are
satisfied and/or released by Agent and Lenders;

          (c)  represents and warrants that no Default or Event of Default has
occurred and is continuing under any of the Existing Financing Agreements, other
than financial covenant defaults which have been cured by this Amendment;

          (d)  represents and warrants that it has the authority and legal right
to execute, deliver and carry out the terms of this Amendment, that such actions
were duly authorized by all

                                       6

<PAGE>

necessary corporate action and that the officers executing this Amendment on its
behalf were similarly authorized and empowered, and that this Amendment does not
contravene any provisions of its Articles of Incorporation and By-laws or of any
contract or agreement to which it is a party or by which any of its properties
are bound; and

          (e)  represents and warrants that this Amendment and all assignments,
instruments, documents, and agreements executed and delivered in connection
herewith, are valid, binding and enforceable in accordance with their respective
terms.

     7.   Effectiveness Conditions. This Amendment shall be effective upon
satisfaction and completion of the following conditions (all documents to be in
form and substance satisfactory to Agent and Agent's counsel):

          (a)  Agent shall have received an executed original of the Stone
Mountain Mortgage in recordable form;

          (b)  Agent shall have received not later than 20 days after the date
of this Amendment a fully paid mortgagee title insurance policy (or binding
commitment to issue a title insurance policy, marked to Agent's satisfaction to
evidence the form of such policy to be delivered with respect to the Stone
Mountain Mortgage), in standard ALTA form, issued by a title insurance company
satisfactory to Agent, in an amount equal to not less than the fair market value
of the Stone Mountain Property, insuring that the Stone Mountain Mortgage
creates a valid Lien on the Stone Mountain Property, with no exceptions which
Agent shall not have approved in writing and no survey exceptions, and failure
of Agent of Agent to receive such policy or commitment shall be an Event of
Default; and

          (c)  Agent shall have received on or before the date of this Amendment
all fees which are payable to Agent or to the Lenders as required by the Loan
Agreement, this Amendment or any fee letter entered into by Borrowers and Agent.

     8.   Further Assurances and Affirmative Covenant. Each Borrower hereby
agrees to take all such actions and to execute and/or deliver to Agent and
Lenders all such documents, assignments, financing statements and other
documents, as Agent and Lenders may reasonably require from time to time, to
effectuate and implement the purposes of this Amendment.

     9.   Payment of Expenses. Borrowers shall pay or reimburse Agent and
Lenders for its reasonable attorneys' fees and expenses in connection with the
preparation, negotiation and execution of this Amendment and the documents
provided for herein or related hereto.

     10.  Reaffirmation of Loan Agreement. Except as modified by the terms
hereof, all of the terms and conditions of the Loan Agreement, as amended, and
all other of the Existing Financing Agreements are hereby reaffirmed and shall
continue in full force and effect as therein written.

                                       7

<PAGE>

     11.  Miscellaneous.

          (a)  Third Party Rights. No rights are intended to be created
hereunder for the benefit of any third party donee, creditor, or incidental
beneficiary.

          (b)  Headings. The headings of any paragraph of this Amendment are for
convenience only and shall not be used to interpret any provision hereof.

          (c)  Modifications. No modification hereof or any agreement referred
to herein shall be binding or enforceable unless in writing and signed on behalf
of the party against whom enforcement is sought.

          (d)  Governing Law. The terms and conditions of this Amendment shall
be governed by the laws of the Commonwealth of Pennsylvania.

          (e)  Counterparts. This Amendment may be executed in any number of
counterparts and by facsimile, each of which when so executed shall be deemed to
be an original and all of which taken together shall constitute one and the same
agreement.

                    [SIGNATURES TO FOLLOW ON SEPARATE PAGES]

                                       8

<PAGE>

     IN WITNESS WHEREOF, the parties have caused this Amendment to be executed
and delivered by their duly authorized officers as of the date first above
written.

                           WINCUP HOLDINGS, INC.

                           By:  /s/ Michael V. Valenza
                               --------------------------------------
                           Michael V. Valenza, Senior Vice President

                           RADNOR CHEMICAL CORPORATION

                           By:  /s/ Michael V. Valenza
                               -------------------------------------------------
                           Michael V. Valenza, President

                           STYROCHEM U.S., LTD.
                           By: StyroChem GP, LLC, its General Partner
                           By: Radnor Chemical Corporation, its Sole Member

                           By:  /s/ Michael V. Valenza
                               -------------------------------------------------
                           Michael V. Valenza, President

                           RADNOR HOLDINGS CORPORATION

                           By:  /s/ Michael V. Valenza
                                ------------------------------------------------
                           Michael V. Valenza, Sr. Vice President

                           RADNOR DELAWARE II, INC.

                           By:  /s/ Michael V. Valenza
                               -------------------------------------------------
                           Michael V. Valenza, President

                           STYROCHEM DELAWARE, INC.

                           By:  /s/ Michael V. Valenza
                               -------------------------------------------------
                           Michael V. Valenza, President

                      Signature Page to Third Amendment to
 Fourth Amended and Restated Revolving Credit, Term Loan and Security Agreement

                                      S-1

<PAGE>

                            WINCUP TEXAS, LTD.

                            By: WinCup GP, LLC, its General Partner
                               By: WinCup Holdings, Inc., its Sole Member

                            By:  /s/ Michael V. Valenza
                                ------------------------------------------------
                            Michael V. Valenza, Sr. Vice President

                            STYROCHEM GP, L.L.C.
                            By: Radnor Chemical Corporation, its Sole Member

                            By:  /s/ Michael V. Valenza
                                ------------------------------------------------
                            Michael V. Valenza, President

                            STYROCHEM LP, L.L.C.
                            By: Radnor Chemical Corporation, its Sole Member

                            By:  /s/ Michael V. Valenza
                                ------------------------------------------------
                            Michael V. Valenza, President

                            WINCUP GP, L.L.C.
                            By: WinCup Holdings, Inc. its Sole Member

                            By:  /s/ Michael V. Valenza
                                ------------------------------------------------
                            Michael V. Valenza, Sr. Vice President

                            WINCUP LP, L.L.C.
                            By: WinCup Holdings, Inc. its Sole Member

                            By:  /s/ Michael V. Valenza
                                ------------------------------------------------
                            Michael V. Valenza, Sr. Vice President

                      Signature Page to Third Amendment to
 Fourth Amended and Restated Revolving Credit, Term Loan and Security Agreement

                                       S-2

<PAGE>

                                  Agents:
                                  PNC BANK, NATIONAL ASSOCIATION,
                                  as Agent

                                  By: /s/ Janeann Fehrle, VP
                                      ------------------------------------------
                                      Janeann Fehrle, Vice President

                                  PNC BANK, NATIONAL ASSOCIATION,
                                  as Lead Arranger and Administrative Agent

                                  By: /s/ Janeann Fehrle, VP
                                      ------------------------------------------
                                      Janeann Fehrle, Vice President

                                  FLEET CAPITAL CORPORATION,
                                  as Documentation Agent

                                  By: /s/ Robert Anehundia
                                      ---------------------------------

                                  Lenders:

                                  PNC BANK, NATIONAL ASSOCIATION,
                                  as Lender

                                  By: /s/ Janeann Fehrle, VP
                                      ------------------------------------------
                                      Janeann Fehrle, Vice President
                                  Commitment Percentage: 33.3333%

                                  FLEET CAPITAL CORPORATION, as Lender

                                  By: /s/ Robert Anehundia
                                      ---------------------------------
                                      Robert Anehundia, Vice President
                                  Commitment Percentage: 27.7777%

                      Signature Page to Third Amendment to
 Fourth Amended and Restated Revolving Credit, Term Loan and Security Agreement

                                       S-3

<PAGE>

                                  LASALLE BUSINESS CREDIT, LLC,
                                  as Lender

                                  By: /s/ Ellen T. Cook
                                      ----------------------------------
                                      Ellen T. Cook/ Vice President
                                  Commitment Percentage: 27.7777%

                                  FIFTH THIRD BANK,
                                  as Lender

                                  By: /s/ Steven M. Kuhn
                                      ----------------------------------
                                      Steven M. Kuhn VP
                                  Commitment Percentage: 11.1111%

                      Signature Page to Third Amendment to
 Fourth Amended and Restated Revolving Credit, Term Loan and Security Agreement

                                       S-4Form of Note Purchase Agreement, dated as of April 14, 2003

 Exhibit 10.24 
  
 NOTE PURCHASE AGREEMENT 
  
 This NOTE PURCHASE AGREEMENT (the “Agreement”), dated to be effective as of the 15th day of April, 2003, is by and among IMPCO Technologies, Inc., a Delaware corporation (the “Company”), and each of the undersigned lenders (each a
“Lender” and collectively the “Lenders”). 
  
 BACKGROUND 
  

	 	A.	 	The Company requires additional capital to provide funding for the exercise of an option (the “BRC Option”) to acquire 50% of the outstanding equity interests of B.R.C.
Societa a Responsibilita Limitata, an Italian limited liability company and to provide for working capital. 

  

	 	B.	 	The Company desires to raise these additional funds by accepting loans from the Lenders. 

  

	 	C.	 	The Lenders desire to lend the Company funds in exchange for notes and warrants issued by the Company on the terms and subject to the conditions set forth herein.

  
 AGREEMENT 
  
 NOW THEREFORE, the parties hereby agree as follows: 
  
 1. Purchase and Sale of Promissory Notes and Warrants 
  
 1.1. Sale and Issuance of Promissory Notes and Warrants. Upon the
terms herein and in reliance on the representation and warranties contained herein, each Lender hereby purchases from the Company, and the Company shall issue and sell to each Lender, at the Closing (as defined below), (i) one or more promissory
notes in the form attached hereto as Exhibit B (each a “Note” and collectively the “Notes”) in the principal amounts set forth opposite the names of the respective Lenders attached hereto as Exhibit A, and (ii) one or more
warrants, in the form attached hereto as Exhibit C (each a “Warrant”, and collectively, the “Warrants”) to purchase Common Stock of the Company (the “Common Stock”). The purchase price for each Note shall be an amount
equal to the principal face amount thereof, and the Company is extending the Warrants as additional consideration to the Lenders for their investment in the Notes. 
  
 1.2. Lending and Repayment of Principal Amounts. Each Lender agrees that the Principal Amounts will be loaned to the
Company at the Closing (as defined below). The Company’s obligations to repay the respective principal amount to each Lender shall be evidenced by, and shall be governed by the terms of, the applicable Note. 
  
 1.3. Closing. The closing of the purchase and sale of the Notes and
Warrants contemplated in Section 1.1 (the “Closing”) shall take place at 10:00 a.m. on the date hereof, or at such other time and date as the parties hereto mutually agree (the “Closing Date”). Notwithstanding any later closing
or issuance of any Note or Warrant, the effective date of the transactions contemplated hereby, including without limitation the computation of interest under the Notes and the exercise price of the Warrants, shall be April 15, 2003. 
  

 Page 1 – NOTE PURCHASE AGREEMENT 

 2. Representations and Warranties of the Company 
  
 The Company represents and warrants to each Lender that the following statements are true and correct as of the date of this
Agreement, unless such specific representation is made as of a specific date, in which case such specific representation shall be true and correct as of the date specified therein: 
  
 2.1 Organization and Standing. The Company is a corporation duly organized and existing under the laws
of the State of Delaware. The Company has requisite power and authority to own and operate its properties and assets, and to carry on its business as presently conducted and as proposed to be conducted. The Company has delivered to each Lender,
prior to the execution of this Agreement, complete and correct copies of its Articles of Incorporation and Bylaws. 
  
 2.2 Requisite Power. The Company has all requisite legal power and authority to execute and deliver this Agreement, to issue each of
the Notes and Warrants to each Lender, and to carry out and perform its other obligations under this Agreement.  
  
 2.3 Capitalization. The Company has issued and, as of the date of this Agreement, there are outstanding [Sixteen Million Four Hundred
Thirty-three Thousand Two Hundred-two (16,433,202)] shares of Common Stock (the “Common Stock”), together with warrants to purchase              shares of Common Stock
and incentive and non-qualified stock options to purchase              shares of Common Stock. Other than as provided in the preceding sentence, there are no outstanding options,
warrants, subscriptions, rights or agreements for the purchase or acquisition from the Company or by the Company of its Common Stock.  
  
 2.4 Authorization. The execution and delivery of this Agreement by the Company and the consummation of the transactions contemplated
hereunder, including without limitation, the execution and delivery of the Notes and Warrants to the Lenders, have been duly authorized by all necessary action on the part of the Company. This Agreement has been executed and delivered by the
Company, and assuming the due authorization, execution and delivery of each of the parties hereto, constitutes a valid and binding obligation of the Company, enforceable in accordance with its terms.  
  
 2.5 Undisclosed Liabilities. The Company has publicly filed a
Transition Report on Form 10-K for the transition period ended December 31, 2002 (the “Transition Report”). The Transition Report complies in all material respects with the requirements for such reports under the Securities Exchange Act of
1934, as amended, and the regulations promulgated thereunder. Except as set forth on the audited balance sheet of the Company contained in the Transition Report, or as otherwise disclosed in the Transition Report, the Company does not have any
material debts, liabilities or obligations of any nature, whether accrued, absolute, contingent or otherwise, and whether due or to become due, including without limitation, liabilities or obligations on account of taxes or other governmental
charges or penalties, interest or fines thereon or in respect thereof required by generally accepted accounting principles to be shown or reflected thereon that were not so shown or reflected.  
  

 Page 2 – NOTE PURCHASE AGREEMENT 

 2.6 Compliance with Other Instruments. The execution and delivery of this Agreement does not, and
the consummation of the transactions contemplated by this Agreement and compliance with the provisions of this Agreement will not conflict with, or result in any violation of, or default (with or without notice or lapse of time, or both) under, or
give rise to a right of termination, cancellation or acceleration of any obligation or loss of a benefit under (i) the Articles of Incorporation or Bylaws of the Company; (ii) any loan or credit agreement, note, bond, mortgage, indenture, lease or
other agreement, instrument, permit, concession, franchise, license or similar authorization applicable to the Company or its respective properties or assets; or (iii) subject to the governmental filings and other matters referred to in the
following sentence, any judgment, order, decree, statute, law, ordinance, rule or regulation applicable to the Company or its respective properties or assets, other than, in the case of clauses (ii) and (iii), any such conflicts, violations,
defaults, rights, losses or liens that individually or in the aggregate are not (A) reasonably likely to materially impair the ability of the Company to perform its obligations under this Agreement or (B) reasonably likely to prevent or materially
delay the consummation of the transactions contemplated by this Agreement. No consent, approval, order or authorization of, action by, or in respect of, or registration, declaration or filing with, any governmental body is required by or with
respect to the Company in connection with the execution and delivery of this Agreement by the Company or the consummation by the Company of the transactions contemplated by this Agreement. 
  
 3. Representations and Warranties of the Lenders 
  
 Each Lender hereby individually represents and warrants, severally but not
jointly, that: 
  
 3.1. Accredited Investors;
Sophistication; No Investment Company. The Lender is an “accredited investor” within the meaning of Rule 501(a) under the Securities Act. Such Lender, either directly or through its officers, directors or affiliates, or in combination
with its advisors, attorneys, accountants, investment bankers or other persons, has substantial experience in evaluating and investing in private placements of securities in enterprises similar to the Company so that it is capable of evaluating the
merits and risks of its investment in the Company and has the capacity to protect its own interests. The Lender is a resident of the state listed next to such Lender’s name on Exhibit A. 
  
 3.2. Investment Intent; Legend. The Lender is acquiring the Note and
Warrant and, upon exercise of the Warrant, if any, the Common Stock for investment for its own account, not as a nominee or agent, and not with the view to, or for resale in connection with, any distribution thereof, to any person or entity. The
Lender understands that the Note and Warrant have not been, and upon exercise of the Common Stock will not have been registered under the Securities Act of 1933 (the “Securities Act”) owing to specific exemptions from the registration
provisions of the Securities Act, the availability of which depend upon, among other things, the bona fide nature of the investment intent and the accuracy of the Lender’s representations as expressed herein. The Lender further understand that
the Common Stock are “restricted securities” within the meaning of rule 144 promulgated under the Securities Act and that, as such; certificates representing the Common Stock, if any, will be imprinted with a legend substantially within
the following form: 
  

 Page 3 – NOTE PURCHASE AGREEMENT 

 THE SHARES EVIDENCED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED, AND HAVE BEEN TAKEN BY THE PERSON WHOSE NAME APPEARS ON THE FACE HEREOF SOLELY FOR PURPOSES OF INVESTMENT. AS SUCH, THE SHARES MAY NOT BE SOLD OR TRANSFERRED UNLESS (A) THEY HAVE BEEN REGISTERED UNDER FEDERAL AND APPLICABLE STATE SECURITIES
LAWS OR (B) THE ISSUER OR ITS TRANSFER AGENT RECEIVES FROM THE TRANSFEROR A WRITTEN OPINION OF COUNSEL SATISFACTORY TO THE ISSUER AS TO FORM, SUBSTANCE AND MAKER, TO THE EFFECT THAT SUCH REGISTRATION IS NOT REQUIRED, AND STATING THE BASIS THEREFOR.

  
 3.3 Restrictions on Subsequent Transfer.
The Lender acknowledges that the Note and the Warrant, and the Common Stock must be held indefinitely unless subsequently registered under the Securities Act and applicable state “blue sky” laws or unless an exemption from such
registration is available. The Lender is aware of the provisions of Rule 144 promulgated under the Securities Act which permit limited resale of securities purchased in a private placement subject to the satisfaction of certain conditions,
including, among other things, the existence of a public market for the shares, the availability of certain current public information about the Company, the resale occurring following the satisfaction of certain holding periods, the sale being
effected through a “broker’s transaction” or in transactions directly with a “market maker” and certain limitations on the number of shares being sold. It is further aware that if the benefits of Rule 144 become available to
holders of the Company’s securities compliance with certain provisions of Rule 144 may be necessary regardless of whether the Note and the Warrant, or any Common Stock are subsequently registered if the Lender is considered an
“affiliate” of the Company for purposes of the rule. The Lender has consulted with its attorneys and financial advisors regarding the effect of Rule 144 and other applicable transfer restrictions and understands fully the potential
problems associated with holding illiquid securities. 
  
 3.4
Review of Reports; Access to Data; Independent Review. The Lender has been advised to review, and to the Lender’s satisfaction the Lender has reviewed, the Transition Report and all documents incorporated by reference therein. Without
limiting the generality of the foregoing, the Lender has reviewed in detail the portions of the Transition Report that included the Company’s audited financial statements at December 31, 2002 and the section entitled “Management’s
Discussion and Analysis of Financial Condition and Results of Operation.” The Lender has had an opportunity to discuss the Company’s business, management and financial affairs with the Company’s management and has had an opportunity
to investigate the Company’s facilities and financial data. The Lender has also had an opportunity to ask questions of officers of the Company regarding those matters, which questions were answered to the Lender’s satisfaction. The Lender
understands that such discussions, as well as any written information issued by the Company, were intended to describe certain aspects of the Company’s business and prospects but were not a thorough or exhaustive description. The Lender has
conducted a thorough investigation of the Company’s business, financial and management condition and has reviewed independently the Company’s prospective operations and performance. 
  

 Page 4 – NOTE PURCHASE AGREEMENT 

 3.5 Reliability of Representations; Indemnity. The Lender recognizes that the Company will rely on
the representations contained in this Agreement to evaluate the suitability of the transactions contemplated hereby for investment by such Lender, and that the Company will further rely on those statements in perfecting an exemption from
registration under the Securities Act and applicable state blue sky laws. As a result, the Lender understands that the Company will rely on all such representations in accepting any subscriptions for the Note and that the Company may take such steps
as it considers reasonable to verify the accuracy and truthfulness of such representations in advance of accepting or rejecting the Lender’s subscription. The Lender hereby grants permission to the Company to take such actions as it deems
reasonably necessary to investigate such representations, and agrees to indemnify and hold harmless the Company against any damage, loss, expense or cost, including, without limitation, reasonable attorneys’ fees, sustained as a result of any
misstatement or omission on the Lender’s part. 
  
 4. Closing.

  
 At the Closing (i) the representations and warranties of
the Company contained in Section 2 shall be true in all respects; (ii) the representations and warranties of the Lenders contained in Section 3 shall be true in all respects; (iii) the Company shall have duly executed and delivered a Note to each of
the Lenders for their respective principal amounts; (iv) the Company shall have duly executed and delivered a Warrant to each of the Lenders; and (v) each Lender shall have delivered the Principal Amount set forth opposite such Lender’s name on
Exhibit A. 
  
 5. Miscellaneous 
  
 5.1 Use of Proceeds. The Company shall use the proceeds from the sale
of the Notes and Warrants under this Agreement as consideration for the exercise of the BRC Option and, to the extent not used therefor, as working capital to be used for the development of the Company as determined by the Company’s management
in its reasonable discretion. 
  
 5.2 Successors and
Assigns. The terms and conditions of this Agreement shall inure to the benefit of and be binding upon the respective successors, heirs and assigns of the parties. Nothing in this Agreement express or implied, is intended to confer upon any party
other than the parties hereto or their respective successors, heirs and assigns any rights, remedies, obligations or liabilities under or by reason of this Agreement, except as expressly provided in this Agreement. 
  
 5.3 Governing Law. This Agreement shall be governed by and construed
under the laws of the State of Delaware as applied to agreements among Delaware residents entered into and to be performed entirely within the State of Delaware, without reference to that state’s choice of law principles. 
  
 5.4 Counterparts. This Agreement may be executed in two or more
counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument. 
  

 Page 5 – NOTE PURCHASE AGREEMENT 

 5.5 Titles and Subtitles. The titles and subtitles used in this Agreement are for convenience only
and are not to be considered in construing or interpreting this Agreement. 
  
 5.6 Notices. Unless otherwise provided, any notice required or permitted under this Agreement shall be given in writing and shall be deemed effectively given upon personal delivery to the party to be notified
(including via facsimile transmission) or upon deposit with the United States Post Office, postage prepaid, registered or certified with return receipt requested and addressed to the party to be notified at the address indicated for such party on
the signature page hereof or at such other address as such party may designate by ten days’ advance written notice to the other parties given in the foregoing manner. In each case such notice shall be addressed as follows: 
  
 To the Company: 
  
 IMPCO Technologies, Inc. 
 16804 Gridley Place Cerritos, 
 California 90703 
 Fax: (562) 924-8069 
 Attn: Robert M. Stemmler 
  
 To the Lenders: 
  
 At the addresses set forth in Exhibit A 
  
 5.7 Attorney and Financial Advisor Fees. Each party shall be responsible for its own legal and financial advisor fees and expenses incurred up to
and including, the date of this Agreement in considering and documenting the transactions contemplated hereby. If, following the execution of this Agreement, any of the parties initiates any litigation against the other party involving this
Agreement, the prevailing parties in such action shall be entitled to receive reimbursement from the initiating parties for all reasonable attorneys’ fees and other costs and expenses incurred by the prevailing party in respect of that
litigation, including any appeal, and such reimbursement may be included in the judgment or final order issued in that proceeding. 
  
 5.8 Amendments and Waivers. After the Closing, any term of this Agreement may be amended and the observance of any term may be waived upon the
written consent of the Company and the Lenders holding a majority of the aggregate principal amount of the outstanding Notes; provided, however, that no such waiver or amendment shall vary the Principal Amount, interest rate, or maturity date of any
Note without the written consent of the holder of such Note affected by such proposed waiver or amendment. 
  
 5.9 Severability. If one or more provisions of this Agreement are held to be unenforceable under applicable law, such provision shall be excluded
from this Agreement, and the balance of this Agreement shall be interpreted as if such provision were so excluded and shall be enforceable in accordance with its terms. 
  

 Page 6 – NOTE PURCHASE AGREEMENT 

 5.10 Counterparts. This Agreement may be executed in two or more counterparts, each of which shall
be deemed an original, but all of which together shall constitute one and the same Agreement. 
  
 5.11 Entire Agreement. This Agreement, including the Exhibits and Schedules attached hereto, the Notes, the Warrants and the other documents delivered at the Closing constitute the full and entire understanding
and agreement between the parties with respect to the subject matter hereof and supersede all prior agreements with respect to the subject matter hereof. 
  
 5.12 Governing Law; Venue and Jurisdiction. This Agreement shall be governed by the laws of the State of California applicable to contracts
negotiated and wholly performed within that state by residents thereof. In the event of any dispute under this Agreement, the Notes or the Warrants, such dispute shall be adjudicated within the federal or state courts of Orange County, California,
and each of the parties hereto expressly consents to the jurisdiction and venue thereof, which jurisdiction and venue shall be mandatory and not elective. 
  
 [Signature Page Follows] 
  

 Page 7 – NOTE PURCHASE AGREEMENT 

 IN WITNESS WHEREOF, the parties have executed this Agreement on the date his or her signature has
been subscribed and sworn to below. 
  

	 COMPANY:
  
 IMPCO Technologies, Inc.

		
	 By:
	 	  

	 	 	 Robert Stemmler
 Its: President and Chief Executive Officer

			
	 	 	 Address:
	 	 16804 Gridley Place Cerritos,
 California 90703

  

 Page 8 – NOTE PURCHASE AGREEMENT 

 COUNTERPART SIGNATURE PAGE 
 TO NOTE PURCHASE AGREEMENT 
 FOR IMPCO TECHNOLOGIES, INC. 
  
 Exact name(s) in which ownership of Notes is to be registered: 
  
                                       
                                        
                                        
                                        
                                        
                    
 (Print Name) 
  
                                       
                                        
                                        
                                        
                                        
                    
 (Signature) 
  
 Address:
                                        
                                        
                                        
                                        
                                        

 
                                       
                                        
                                        
                                        
                                        
                    
  

	 Phone:
                                        
                                    
	 	 Fax:
                                        
                                     
 

		
	 Email:
                                        
                                      
	 	 Date:
                                        
                                    

  

 Page 9 – NOTE PURCHASE AGREEMENT 

 EXHIBIT A 
  
 PROMISSORY NOTE 
 SCHEDULE OF LENDERS 
  

	 Investor Name

	  	 Principal
 Amount

	  	 Total
 Loan
Amount

	 	  	 	  	 	 
	 	  	 	  	 	 
	 	  	 	  	 	 
	 	  	 	  	 	 
	 	  	 	  	 	 
	 	  	 	  	 	 
	 Total
	  	 	  	$	 

 (all amounts shown
are in United States Dollars) 
  

 Page 10 – NOTE PURCHASE AGREEMENT 

 EXHIBIT B 
  
 FORM OF PROMISSORY NOTE 
  

 Page 12 – NOTE PURCHASE AGREEMENT 

 EXHIBIT C 
  
 FORM OF WARRANT 
  

 Page 13 – NOTE PURCHASE AGREEMENT

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