Document:

<PAGE>

                                                                   EXHIBIT 10.11

                     INVESTOR STOCKHOLDERS JOINDER AGREEMENT

      THIS INVESTOR STOCKHOLDERS JOINDER AGREEMENT (this "Joinder") is executed
as of May __, 2004, by and among Bostrom Holding, Inc., a Delaware corporation
(the "Company") and the Persons listed on Schedule A attached hereto (the "New
Investors").

      WHEREAS, the Company, Onex Corporation, J2R Partners VII and certain other
stockholders of the Company are party to that certain Investor Stockholders
Agreement, dated as of October 5, 2000, as amended (the "Stockholders
Agreement"). Capitalized terms used but not defined herein have the meaning
given to them in the Stockholders Agreement.

      WHEREAS, the New Investors have acquired shares in the Company pursuant to
that certain Agreement and Plan of Merger, dated even herewith, by and between
the Company, Trim Merger Co., and Trim Systems, Inc.

      WHEREAS, the Company desires to provide the New Investors rights under the
Stockholders Agreement as set forth herein.

      NOW, THEREFORE, the parties hereto agree as follows:

      1. Joinder. The parties hereto agree that, by and upon execution of this
Joinder, each New Investor (i) shall be a party to the Stockholders Agreement,
(ii) shall be an "Other Stockholder" and a "Stockholder" (as such terms are
defined in the Stockholders Agreement) and (iii) shall be entitled to the rights
and benefits and subject to the duties and obligations of an Other Stockholder
and a Stockholder thereunder, as fully as if such New Investor had been an
original signatory thereto in such capacity.

      2. Continuing Effect. Other than as modified in accordance with the
foregoing provisions, the remaining terms of the Stockholders Agreement remain
in full force and effect.

      3. Counterparts. This Joinder may be executed in separate counterparts
each of which shall be an original and all of which taken together shall
constitute one and the same agreement.

      4. Governing Law. All questions concerning the construction, validity and
interpretation of this Joinder shall be governed by and construed in accordance
with the internal laws, and not the law of conflicts, of Delaware.

      5. Descriptive Headings. The descriptive headings of this Agreement are
inserted for convenience only and do not constitute a part of this Agreement.

                                    * * * * *

<PAGE>

      IN WITNESS WHEREOF, this Joinder has been entered into as of the date
first above written.

                               BOSTROM HOLDING, INC.

                               By:  ______________________________
                               Name:______________________________
                               Its: ______________________________

                               ONEX DHC LLC

                               By:  ______________________________
                               Name:______________________________
                               Its: ______________________________

                               TRIM SYSTEMS EXECUTIVE INVESTCO LLC

                               By:  ______________________________
                               Name:______________________________
                               Its: ______________________________

                               TRIM SYSTEMS EXECUTIVE INVESTCO II LLC

                               By:  ______________________________
                               Name:______________________________
                               Its: ______________________________

<PAGE>

   [Continuation of signature page to Investor Stockholders Joinder Agreement]

                               AMON CANADIAN INVESTMENTS, LTD.

                               By:  ______________________________
                               Name:______________________________
                               Its: ______________________________

                               MHON CANADIAN INVESTMENTS, LTD

                               By:  ______________________________
                               Name:______________________________
                               Its: ______________________________

                               J2R PARTNERS II

                               By:  ______________________________
                               Name:______________________________
                               Its: ______________________________

                               ________________________________________
                               Marni L. Johnson

                               ________________________________________
                               Ronald A. Johnson

                               ________________________________________
                               Robert R. Hibbs

<PAGE>

  [Continuation to signature page for Investor Stockholders Joinder Agreement]

Acknowledged and Agreed:

                                  J2R PARTNERS VI

_______________________________   By:___________________________________________
S.A. JOHNSON                      Its:__________________________________________

                                  BAIRD CAPITAL PARTNERS III
                                  LIMITED PARTNERSHIP

_______________________________   By:___________________________________________
SCOTT D. RUED                     Its:__________________________________________

                                  BCP III AFFILIATES FUND
                                  LIMITED PARTNERSHIP

_______________________________   By:___________________________________________
J. REID PORTER                    Its:__________________________________________

                                  BCP III SPECIAL AFFILIATES
                                  LIMITED PARTNERSHIP

_______________________________   By:___________________________________________
CARL E. NELSON                    Its:__________________________________________

                                  BAIRD CAPITAL PARTNERS II
                                  LIMITED PARTNERSHIP

_______________________________   By:___________________________________________
DAVID J. HULS                     Its:__________________________________________

<PAGE>

  [Continuation to signature page for Investor Stockholders Joinder Agreement]

                                  BCP II AFFILIATES FUND
                                  LIMITED PARTNERSHIP

_______________________________   By:___________________________________________
DANIEL F. MOORSE                  Its:__________________________________________

                                  RANDOLPH STREET PARTNERS II

_______________________________   By:___________________________________________
JUDITH V. VIJUMS                  Its:__________________________________________

HIDDEN CREEK INDUSTRIES           NORWEST EQUITY PARTNERS VII, LP

By:____________________________   By:___________________________________________
Its:___________________________   Its:__________________________________________

<PAGE>

                                   Schedule A

                                  ONEX DHC LLC
                       TRIM SYSTEMS EXECUTIVE INVESTCO LLC
                     TRIM SYSTEMS EXECUTIVE INVESTCO II LLC
                         AMON CANADIAN INVESTMENTS, LTD.
                         MHON CANADIAN INVESTMENTS, LTD
                                 J2R PARTNERS II
                                Marni L. Johnson
                                Ronald A. Johnson
                                 Robert R. Hibbs<PAGE>

                                                                   EXHIBIT 10.19

                         NONQUALIFIED STOCK OPTION PLAN

                              BOSTROM HOLDING, INC.
                          MANAGEMENT STOCK OPTION PLAN

                                    ARTICLE I

                                 Purpose of Plan

            The Bostrom Holding, Inc. Management Stock Option Plan (the "Plan")
of Bostrom Holding, Inc. (the "Company"), adopted by the Board of Directors of
the Company on May __, 2004, for executive and other key employees of the
Company, is intended to advance the best interests of the Company by providing
those persons who have a substantial responsibility for its management and
growth with additional incentives by allowing them to acquire an ownership
interest in the Company and thereby encouraging them to contribute to the
success of the Company and to remain in its employ. The availability and
offering of stock options under the Plan also increases the Company's ability to
attract and retain individuals of exceptional managerial talent upon whom, in
large measure, the sustained progress, growth and profitability of the Company
depends.

            This Plan is intended to be a "compensatory benefit plan" within the
meaning of such term under Rule 701 of the Securities Act of 1933, as amended.

                                   ARTICLE II

                                   Definitions

            For purposes of the Plan, except where the context clearly indicates
otherwise, the following terms shall have the meanings set forth below:

            "Board" shall mean the Board of Directors of the Company.

            "Cause" shall mean (i) a Participant's theft or embezzlement, or
attempted theft or embezzlement, of money or property of the Company, a
Participant's perpetration or attempted perpetration of fraud, or a
Participant's participation in a fraud or attempted fraud, on the Company or a
Participant's unauthorized appropriation of, or a Participant's attempt to
misappropriate, any tangible or intangible assets or property of the Company,
(ii) any act or acts of disloyalty, misconduct or moral turpitude by a
Participant injurious to the interest, property, operations, business or
reputation of the Company or a Participant's conviction of a crime the
commission of which results in injury to the Company (iii) a Participant's
failure or inability (other than by reason of Disability) to carry out
effectively his duties and obligations to the Company or to participate
effectively and actively in the management of the Company, as determined in the
good faith judgment of the Board, or (iv) a Participant's failure to comply with
the written policies of the Company or perform duties as reasonably directed by
the Board.

<PAGE>

            "Code" shall mean the Internal Revenue Code of 1986, as amended, and
any successor statute.

            "Committee" shall mean the committee of the Board which may be
designated by the Board to administer the Plan. The Committee shall be composed
of two or more directors as appointed from time to time to serve by the Board.
The membership of the Committee shall be constituted so as to comply at all
times with the applicable requirements of Rule 16b-3 or any successor rule
("Rule 16b-3") under the Securities Exchange Act of 1934, as amended. No member
of the Committee shall have within one year prior to his or her appointment
received awards under the Plan if such receipt would cause such member to cease
to be a "disinterested person" under Rule 16b-3.

            "Common Stock" shall mean the Company's Class A Common Stock, par
value $.01 per share, or if the outstanding Common Stock is hereafter changed
into or exchanged for different stock or securities of the Company, such other
stock or securities.

            "Company" shall mean Bostrom Holding, Inc., a Delaware corporation,
and (except to the extent the context requires otherwise) any subsidiary
corporation of Bostrom Holding, Inc. as such term is defined in Section 424(f)
of the Code.

            "Disability" shall mean the inability, due to illness, accident,
injury, physical or mental incapacity or other disability, of any Participant to
carry out effectively his duties and obligations to the Company or to
participate effectively and actively in the management of the Company for a
period of at least 90 consecutive days or for shorter periods aggregating at
least 120 days (whether or not consecutive) during any twelve-month period, as
determined in the reasonable judgment of the Board.

            "Options" shall have the meaning set forth in Article IV.

            "Participant" shall mean any executive or other key employee of the
Company who has been selected to participate in the Plan by the Committee or the
Board.

            "Person" means an individual, a partnership, a corporation, a
limited liability company, an association, a joint stock company, a trust, a
joint venture, an unincorporated organization and a governmental entity or any
department, agency or political subdivision thereof.

            "Sale of the Company" shall mean a merger or consolidation effecting
a change in control of the Company, a sale of all or substantially all of the
Company's assets or a sale of a majority of the Company's outstanding voting
securities.

                                   ARTICLE III

                                 Administration

            The Plan shall be administered by the Committee; provided that if
for any reason the Committee shall not have been appointed by the Board, all
authority and duties of the

<PAGE>

Committee under the Plan shall be vested in and exercised by the Board. Subject
to the limitations of the Plan, the Committee shall have the sole and complete
authority to: (i) select Participants, (ii) grant Options (as defined in Article
IV below) to Participants in such forms and amounts as it shall determine, (iii)
impose such limitations, restrictions and conditions upon such Options as it
shall deem appropriate, (iv) interpret the Plan and adopt, amend and rescind
administrative guidelines and other rules and regulations relating to the Plan,
(v) correct any defect or omission or reconcile any inconsistency in the Plan or
in any Option granted hereunder and (vi) make all other determinations and take
all other actions necessary or advisable for the implementation and
administration of the Plan. The Committee's determinations on matters within its
authority shall be conclusive and binding upon the Participants, the Company and
all other Persons. All expenses associated with the administration of the Plan
shall be borne by the Company. The Committee may, as approved by the Board and
to the extent permissible by law, delegate any of its authority hereunder to
such persons as it deems appropriate.

                                   ARTICLE IV

                         Limitation on Aggregate Shares

            The number of shares of Common Stock with respect to which options
may be granted under the Plan (the "Options") and which may be issued upon the
exercise thereof shall not exceed, in the aggregate, 22,790 shares; provided
that the type and the aggregate number of shares which may be subject to Options
shall be subject to adjustment in accordance with the provisions of paragraph
6.8 below, and further provided that to the extent any Options expire
unexercised or are canceled, terminated or forfeited in any manner without the
issuance of Common Stock thereunder, or if any Options are exercised and the
shares of Common Stock issued thereunder are repurchased by the Company, such
shares shall again be available under the Plan. The 22,790 shares of Common
Stock available under the Plan may be either authorized and unissued shares,
treasury shares or a combination thereof, as the Committee shall determine.

                                    ARTICLE V

                                     Awards

            5.1   Options. Subject to Article III above, the Committee may grant
Options to Participants in accordance with this Article V.

            5.2   Form of Option. Options granted under this Plan shall be
nonqualified stock options and are not intended to be "incentive stock options"
within the meaning of Section 422 of the Code or any successor provision.

            5.3   Exercise Price. The option exercise price per share of Common
Stock shall be fixed by the Committee.

            5.4   Exercisability. Options shall be exercisable at such time or
times as the Committee shall determine at or subsequent to grant.

<PAGE>

            5.5   Payment of Exercise Price. Options shall be exercised in whole
or in part by written notice to the Company (to the attention of the Company's
Secretary) accompanied by payment in full of the option exercise price. Payment
of the option exercise price shall be made in cash (including check, bank draft
or money order) or, in the discretion of the Committee, by delivery of a
promissory note (if in accordance with policies approved by the Board).

            5.6   Terms of Options. The Committee shall determine the term of
each Option, which term shall in no event exceed ten years from the date of
grant.

                                   ARTICLE VI

                               General Provisions

            6.1   Conditions and Limitations on Exercise. Options may be made
exercisable in one or more installments, upon the happening of certain events,
upon the passage of a specified period of time, upon the fulfillment of certain
conditions or upon the achievement by the Company of certain performance goals,
as the Committee shall decide in each case when the Options are granted.

            6.2   Sale of the Company. In the event of a Sale of the Company,
the Committee or the Board may provide, in its discretion, that the Options
shall become immediately exercisable by any Participants who are employed by the
Company at the time of the Sale of the Company and/or that all Options shall
terminate if not exercised as of the date of the Sale of the Company or other
prescribed period of time.

            6.3   Written Agreement. Each Option granted hereunder to a
Participant shall be embodied in a written agreement (an "Option Agreement")
which shall be signed by the Participant and by the Chairman or the President of
the Company for and in the name and on behalf of the Company and shall be
subject to the terms and conditions of the Plan prescribed in the Agreement
(including, but not limited to, (i) the right of the Company and such other
Persons as the Committee shall designate ("Designees") to repurchase from each
Participant, and such Participant's transferees, all shares of Common Stock
issued or issuable to such Participant on the exercise of an Option in the event
of such Participant's termination of employment, (ii) rights of first refusal
granted to the Company and Designees, (iii) holdback and other registration
right restrictions in the event of a public registration of any equity
securities of the Company and (iv) any other terms and conditions which the
Committee shall deem necessary and desirable).

            6.4   Listing, Registration and Compliance with Laws and
Regulations. Options shall be subject to the requirement that if at any time the
Committee shall determine, in its discretion, that the listing, registration or
qualification of the shares subject to the Options upon any securities exchange
or under any state or federal securities or other law or regulation, or the
consent or approval of any governmental regulatory body, is necessary or
desirable as a condition to or in connection with the granting of the Options or
the issuance or purchase of shares thereunder, no Options may be granted or
exercised, in whole or in part, unless such listing, registration,
qualification, consent or approval shall have been effected or obtained free of
any conditions not acceptable to the Committee. The holders of such Options
shall supply the

<PAGE>

Company with such certificates, representations and information as the Company
shall request and shall otherwise cooperate with the Company in obtaining such
listing, registration, qualification, consent or approval. In the case of
officers and other Persons subject to Section 16(b) of the Securities Exchange
Act of 1934, as amended, the Committee may at any time impose any limitations
upon the exercise of an Option that, in the Committee's discretion, are
necessary or desirable in order to comply with such Section 16(b) and the rules
and regulations thereunder. If the Company, as part of an offering of securities
or otherwise, finds it desirable because of federal or state regulatory
requirements to reduce the period during which any Options may be exercised, the
Committee, may, in its discretion and without the Participant's consent, so
reduce such period on not less than 15 days written notice to the holders
thereof.

            6.5   Nontransferability. Options may not be transferred other than
by will or the laws of descent and distribution and, during the lifetime of the
Participant, may be exercised only by such Participant (or his legal guardian or
legal representative). In the event of the death of a Participant, exercise of
Options granted hereunder shall be made only:

                  (i)   by the executor or administrator of the estate of the
      deceased Participant or the Person or Persons to whom the deceased
      Participant's rights under the Option shall pass by will or the laws of
      descent and distribution; and

                  (ii)  to the extent that the deceased Participant was entitled
      thereto at the date of his death, unless otherwise provided by the
      Committee in such Participant's Option Agreement.

            6.6   Expiration of Options. Normal Expiration. In no event shall
any part of any Option be exercisable after the date of expiration thereof (the
"Expiration Date"), as determined by the Committee pursuant to paragraph 5.6
above.

            (a)   Early Expiration Upon Termination of Employment. Except as
otherwise provided by the Committee in the Option Agreement, any portion of a
Participant's Option that was not vested and exercisable on the date of the
termination of such Participant's employment shall expire and be forfeited as of
such date, and any portion of a Participant's Option that was vested and
exercisable on the date of the termination of such Participant's employment
shall expire and be forfeited as of such date, except that: (i) if any
Participant dies or becomes subject to any Disability, such Participant's Option
shall expire 180 days after the date of his death or Disability, but in no event
after the Expiration Date, (ii) if any Participant retires (with the approval of
the Board), his Option shall expire 90 days after the date of his retirement,
but in no event after the Expiration Date, and (iii) if any Participant is
discharged other than for Cause, such Participant's Option shall expire 30 days
after the date of his discharge, but in no event after the Expiration Date.

            6.7   Withholding of Taxes. The Company shall be entitled, if
necessary or desirable, to withhold from any Participant from any amounts due
and payable by the Company to such Participant (or secure payment from such
Participant in lieu of withholding) the amount of any withholding or other tax
due from the Company with respect to any shares issuable under the Options, and
the Company may defer such issuance unless indemnified to its satisfaction.

<PAGE>

            6.8   Adjustments. In the event of a reorganization,
recapitalization, stock dividend or stock split, or combination or other change
in the shares of Common Stock or any merger, consolidation or exchange of
shares, the Board or the Committee may, in order to prevent the dilution or
enlargement of rights under outstanding Options, make such adjustments in the
number and type of shares authorized by the Plan, the number and type of shares
covered by outstanding Options and the exercise prices specified therein as may
be determined to be appropriate and equitable.

            6.9   Rights of Participants. Nothing in this Plan or in any Option
Agreement shall interfere with or limit in any way the right of the Company to
terminate any Participant's employment at any time (with or without Cause), nor
confer upon any Participant any right to continue in the employ of the Company
for any period of time or to continue his present (or any other) rate of
compensation, and except as otherwise provided under this Plan or by the
Committee in the Option Agreement, in the event of any Participant's termination
of employment (including, but not limited to, the termination by the Company
without Cause) any portion of such Participant's Option that was not previously
vested and exercisable shall expire and be forfeited as of the date of such
termination. No employee shall have a right to be selected as a Participant or,
having been so selected, to be selected again as a Participant.

            6.10  Amendment, Suspension and Termination of Plan. The Board or
the Committee may suspend or terminate the Plan or any portion thereof at any
time and may amend it from time to time in such respects as the Board or the
Committee may deem advisable; provided that no such amendment shall be made
without stockholder approval to the extent such approval is required by law,
agreement or the rules of any exchange upon which the Common Stock is listed,
and no such amendment, suspension or termination shall impair the rights of
Participants under outstanding Options without the consent of the Participants
affected thereby. No Options shall be granted hereunder after the tenth
anniversary of the adoption of the Plan.

            6.11  Amendment, Modification and Cancellation of Outstanding
Options. The Committee may amend or modify any Option in any manner to the
extent that the Committee would have had the authority under the Plan initially
to grant such Option; provided that no such amendment or modification shall
impair the rights of any Participant under any Option without the consent of
such Participant. With the Participant's consent, the Committee may cancel any
Option and issue a new Option to such Participant.

            6.12  Indemnification. In addition to such other rights of
indemnification as they may have as members of the Board or the Committee, the
members of the Committee shall be indemnified by the Company against all costs
and expenses reasonably incurred by them in connection with any action, suit or
proceeding to which they or any of them may be party by reason of any action
taken or failure to act under or in connection with the Plan or any Option
granted thereunder, and against all amounts paid by them in settlement thereof
(provided such settlement is approved by independent legal counsel selected by
the Company) or paid by them in satisfaction of a judgment in any such action,
suit or proceeding; provided that any such Committee member shall be entitled to
the indemnification rights set forth in this paragraph 6.12 only if such member
has acted in good faith and in a manner that such member reasonably believed to
be in or not opposed to the best interests of the Company and, with respect to
any

<PAGE>

criminal action or proceeding, had no reasonable cause to believe that such
conduct was unlawful, and further provided that upon the institution of any such
action, suit or proceeding a Committee member shall give the Company written
notice thereof and an opportunity, at its own expense, to handle and defend the
same before such Committee member undertakes to handle and defend it on his own
behalf.

                                     * * * *

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00068-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00068-of-00352.parquet"}]]