Document:

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                                                                    EXHIBIT 10.4

                           AMERICAN SEAFOODS GROUP LLC

                             AMERICAN SEAFOODS, INC.

                      SOUTHERN PRIDE CATFISH TRUCKING INC.

10 1/8% SENIOR SUBORDINATED NOTES DUE 2010

                             Supplemental Indenture
                          Dated as of December 16, 2002

                                   Wells Fargo
                                 Bank Minnesota,
                              National Association
                                   as Trustee

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                             SUPPLEMENTAL INDENTURE

     Supplemental Indenture (this "Supplemental Indenture"), dated as of
December 16, 2002, among Southern Pride Catfish Trucking Inc., a Delaware
corporation (the "Guaranteeing Subsidiary"), an indirect wholly owned subsidiary
of American Seafoods Group LLC (or its permitted successor), a Delaware limited
liability company (the "Company"), the Company, American Seafoods, Inc., a
Delaware corporation and wholly owned subsidiary of the Company ("ASI" and
together with the Company, collectively, the "Issuers" and each an "Issuer"),
the other Guarantors (as defined in the Indenture referred to herein) and Wells
Fargo Bank Minnesota, National Association, as trustee under the Indenture
referred to below (the "Trustee").

                               W I T N E S S E T H

          WHEREAS, the Company and ASI has heretofore executed and delivered to
the Trustee an indenture (the "Indenture"), dated as of April 18, 2002 providing
for the issuance of an aggregate principal amount of $175 million of 10 1/8%
Senior Subordinated Notes due 2010 (the "Notes");

          WHEREAS, the Indenture provides that under certain circumstances the
Guaranteeing Subsidiary shall execute and deliver to the Trustee a supplemental
indenture pursuant to which the Guaranteeing Subsidiary shall unconditionally
guarantee all of the obligations of the Issuers under the Notes and the
Indenture on the terms and conditions set forth herein (the "Note Guarantee");
and

          WHEREAS, pursuant to Section 9.01 of the Indenture, the Trustee is
authorized to execute and deliver this Supplemental Indenture.

          NOW THEREFORE, in consideration of the foregoing and for other good
and valuable consideration, the receipt of which is hereby acknowledged, the
Guaranteeing Subsidiary and the Trustee mutually covenant and agree for the
equal and ratable benefit of the Holders of the Notes as follows:

          1.   Capitalized Terms. Capitalized terms used herein without
definition shall have the meanings assigned to them in the Indenture.

          2.   Agreement to Guarantee. The Guaranteeing Subsidiary hereby agrees
as follows:

          (a)  Along with all other Guarantors, to jointly and severally
     Guarantee to each Holder of a Note authenticated and delivered by the
     Trustee and to the Trustee and its successors and assigns, irrespective of
     the validity and

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     enforceability of the Indenture, the Notes or the obligations of the
     Issuers hereunder or thereunder, that:

          (i)  the principal of and interest on the Notes will be promptly paid
          in full when due, whether at maturity, by acceleration, redemption or
          otherwise, and interest on the overdue principal of and interest on
          the Notes, if any, if lawful, and all other obligations of the Company
          to the Holders or the Trustee hereunder or thereunder will be promptly
          paid in full or performed, all in accordance with the terms hereof and
          thereof; and

          (ii) in case of any extension of time of payment or renewal of any
          Notes or any of such other obligations, the same will be promptly paid
          in full when due or performed in accordance with the terms of the
          extension or renewal, whether at stated maturity, by acceleration or
          otherwise. Failing payment when due of any amount so guaranteed or any
          performance so guaranteed for whatever reason, the Guarantors shall be
          jointly and severally obligated to pay the same immediately. This Note
          Guarantee is a guarantee of payment and not of collection.

          (b)  The obligations hereunder shall be unconditional, irrespective of
     the validity, regularity or enforceability of the Notes or the Indenture,
     the absence of any action to enforce the same, any waiver or consent by any
     Holder of the Notes with respect to any provisions hereof or thereof, the
     recovery of any judgment against the Companies, any action to enforce the
     same or any other circumstance that might otherwise constitute a legal or
     equitable discharge or defense of a guarantor.

          (c)  Subject to Section 6.06 of the Indenture, the following is hereby
     waived: diligence, presentment, demand of payment, filing of claims with a
     court in the event of insolvency or bankruptcy of the Company, any right to
     require a proceeding first against the Company, protest, notice and all
     demands whatsoever.

          (d)  The Note Guarantee shall not be discharged except by complete
     performance of the obligations contained in the Notes and the Indenture.

          (e)  If any Holder or the Trustee is required by any court or
     otherwise to return to the Company, the Guarantors, or any Custodian,
     Trustee, liquidator or other similar official acting in relation to either
     the Company or the Guarantors, any amount paid by either to the Trustee or
     such Holder, this Note Guarantee, to the extent theretofore discharged,
     shall be reinstated in full force and effect.

          (f)  The Guaranteeing Subsidiary shall not be entitled to any right of

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     subrogation in relation to the Holders in respect of any obligations
     guaranteed hereby until payment in full of all obligations guaranteed
     hereby.

          (g) As between the Guarantors, on the one hand, and the Holders and
     the Trustee, on the other hand, (x) the maturity of the obligations
     guaranteed hereby may be accelerated as provided in Article Six of the
     Indenture for the purposes of this Note Guarantee, notwithstanding any
     stay, injunction or other prohibition preventing such acceleration in
     respect of the obligations guaranteed hereby, and (y) in the event of any
     declaration of acceleration of such obligations as provided in Article Six
     of the Indenture, such obligations (whether or not due and payable) shall
     forthwith become due and payable by the Guarantors for the purpose of this
     Note Guarantee.

          (h) Pursuant to Section 11.03 of the Indenture, after giving effect to
     any maximum amount and any other contingent and fixed liabilities that are
     relevant under any applicable Bankruptcy or fraudulent conveyance laws, and
     after giving effect to any collections from, rights to receive contribution
     from or payments made by or on behalf of any other Guarantor in respect of
     the obligations of such other Guarantor under Article Eleven of the
     Indenture shall result in the obligations of such Guarantor under its Note
     Guarantee constituting a fraudulent transfer or conveyance.

          3.  Subordination. The Obligations of the Guaranteeing Subsidiary
under its Note Guarantee pursuant to this Supplemental Indenture shall be junior
and subordinated to the prior payment in full of all Senior Debt of the
Guaranteeing Subsidiary (including Senior Debt of the Guaranteeing Subsidiary
incurred after the date of the Indenture) on the same basis as the Notes are
junior and subordinated to the Senior Debt of the Company as described in
Article Ten of the Indenture. For the purposes of the foregoing sentence, the
Trustee and the Holders shall have the right to receive and/or retain payments
by the Guaranteeing Subsidiary only at such time as they may receive and/or
retain payments in respect of the Notes pursuant to the Indenture, including
Article Ten thereof.

          4.  Execution and Delivery. Each Guaranteeing Subsidiary agrees that
the Note Guarantees shall remain in full force and effect notwithstanding any
failure to endorse on each Note a notation of such Note Guarantee.

          5.  Guaranteeing Subsidiary May Consolidate, Etc., on Certain Terms.
Except as otherwise provided in Section 11.06 of the Indenture, a Guarantor may
not sell or otherwise dispose of all or substantially all of its assets, or
consolidate with or merge with or into (whether or not such Guarantor is the
surviving Person) another Person other

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than the Company or another Guarantor, unless either:

     (1)  (a) immediately after giving effect to such transaction, no Default or
     Event of Default exists; and

          (b) the Person acquiring the property in any such sale or disposition
     or the Person formed by or surviving any such consolidation or merger is a
     corporation or limited liability company, organized or existing under the
     laws of the United States, any state thereof or the District of Columbia
     and assumes all the obligations of that Guarantor under the Indenture, its
     Note Guarantee and the Registration Rights Agreement pursuant to a
     supplemental indenture satisfactory to the Trustee; or

     (2)  such sale or other disposition complies with Section 4.10, including
     the application of the Net Proceeds therefrom.

          In case of any such consolidation, merger, sale or conveyance and upon
the assumption by the successor Person, by supplemental indenture, executed and
delivered to the Trustee and satisfactory in form to the Trustee, of the Note
Guarantee endorsed upon the Notes and the due and punctual performance of all of
the covenants and conditions of the Indenture to be performed by a Guarantor,
such successor Person shall succeed to and be substituted for a Guarantor with
the same effect as if it had been named herein as a Guarantor. Such successor
Person thereupon may cause to be signed any or all of the Note Guarantees to be
endorsed upon all of the Notes issuable hereunder which theretofore shall not
have been signed by the Company and delivered to the Trustee. All the Note
Guarantees so issued shall in all respects have the same legal rank and benefit
under the Indenture as the Note Guarantees theretofore and thereafter issued in
accordance with the terms of the Indenture as though all of such Note Guarantees
had been issued at the date of the execution hereof.

          Except as set forth in Articles 4 and 5 of the Indenture, and
notwithstanding clauses (1) and (2) above, nothing contained in the Indenture or
in any of the Notes shall prevent any consolidation or merger of a Guarantor
with or into the Company or another Guarantor, or shall prevent any sale or
conveyance of the property of a Guarantor as an entirety or substantially as an
entirety to the Company or another Guarantor.

          6.  Releases.

          (a) Any Guarantor will be released and relieved of any obligations
     under its Note Guarantee (i) in connection with any sale of Capital Stock
     of a Guarantor to a Person that is not (either before or after giving
     effect to such transaction) an

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     Affiliate of the Company, in compliance with either clause (1) or clause
     (2) of the first paragraph of Section 4.16 of the Indenture; (ii) if the
     Company properly designates any Restricted Subsidiary that is a Guarantor
     as an Unrestricted Subsidiary; or (iii) upon legal defeasance of the
     Company's and all Guarantors' obligations pursuant to Section 8.02 of the
     Indenture or upon satisfaction and discharge of the Indenture pursuant to
     Section 12.01 of the Indenture. Upon delivery by the Company to the Trustee
     of an Officers' Certificate and an Opinion of Counsel to the effect that
     such sale or other disposition was made by the Company in accordance with
     the provisions of the Indenture, including without limitation Section 4.10
     hereof, the Trustee shall execute any documents reasonably required in
     order to evidence the release of any Guarantor from its obligations under
     its Note Guarantee.

          (b)  Any Guarantor not released from its obligations under its Note
     Guarantee shall remain liable for the full amount of principal of and
     interest on the Notes and for the other obligations of any Guarantor under
     the Indenture as provided in Article Eleven of the Indenture.

          7.   No Recourse Against Others. No past, present or future director,
officer, employee, incorporator, member, stockholder or agent of the
Guaranteeing Subsidiary (or any holder of an Equity Interest in the Guaranteeing
Subsidiary), as such, shall have any liability for any obligations of the
Company or any Guaranteeing Subsidiary under the Notes, any Note Guarantees, the
Indenture or this Supplemental Indenture or for any claim based on, in respect
of, or by reason of, such obligations or their creation. Each Holder of the
Notes by accepting a Note waives and releases all such liability. The waiver and
release are part of the consideration for issuance of the Notes. The waiver may
not be effective to waive liabilities under the federal securities laws.

          8.   NEW YORK LAW TO GOVERN. THE INTERNAL LAW OF THE STATE OF NEW YORK
SHALL GOVERN AND BE USED TO CONSTRUE THIS SUPPLEMENTAL INDENTURE BUT WITHOUT
GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO THE EXTENT THAT
THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION WOULD BE REQUIRED THEREBY.

          9.   Counterparts. The parties may sign any number of copies of this
Supplemental Indenture. Each signed copy shall be an original, but all of them
together represent the same agreement.

         10.   Effect of Headings. The Section headings herein are for
convenience only and shall not affect the construction hereof.

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         11.   Trustee. The Trustee shall not be responsible in any manner
whatsoever for or in respect of the validity or sufficiency of this Supplemental
Indenture or for or in respect of the recitals contained herein, all of which
recitals are made solely by the Guaranteeing Subsidiary and the Company.

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         IN WITNESS WHEREOF, the parties hereto have caused this Supplemental
Indenture to be duly executed and attested, all as of the date first above
written.

Dated:  December 16, 2002

                                   SOUTHERN PRIDE CATFISH TRUCKING INC.

                                   By: /s/ Joe T. Glover, Jr.
                                   Name: Joe T. Glover, Jr.
                                   Title: President

                                   AMERICAN SEAFOODS GROUP LLC

                                   By: /s/ Bernt Bodal
                                   Name: Bernt Bodal
                                   Title: Managing Director

                                   AMERICAN SEAFOODS, INC.

                                   By: /s/ Bernt Bodal
                                   Name: Bernt Bodal
                                   Title: Managing Director

                                   Wells Fargo Bank Minnesota,
                                   National Association
                                         as Trustee

                                         By:  /s/ Joseph P. O'Donnell
                                             -----------------------------------
                                             Name: Joseph P. O'Donnell
                                             Title: Corporate Trust Officer

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                                                                   EXHIBIT 10.18

                     McLaren Performance Technologies, Inc.

                               September 23, 2002

Amherst H. Turner
401 East Stadium
Ann Arbor, MI 48014

         RE:   Amendment to Warrant and Subordinated Convertible Note

Dear Amherst:

     This letter amends the (i) Warrant, dated March 24, 2002, to purchase
37,500 shares at $1.00 a share (the "Warrant") issued by McLaren Performance
Technologies, Inc. (the "Company"); and (ii) Subordinated Convertible Promissory
Note, dated March 24, 2002, in the amount of $250,000 issued by the Company (the
"Note"), as set forth below. Capitalized terms not defined herein have the
meaning given to them in the Warrant or Note, as applicable.

     You agree that in no event may the number of shares issued, in the
aggregate, pursuant to the Warrant and Note exceed 25,000 (the "Cap") without
the prior approval of the Company's stockholders, if such approval is required
by any applicable NASD or other market rule. In the event that an applicable
NASD or other market rule does require approval, the Company agrees to include a
proposal in its proxy statement, for the Annual Meeting to be held in 2003,
whereby the Board of Directors recommends to the stockholders the approval of
the potential issuance of 37,500 shares pursuant to the Warrant and the issuance
of that number of shares (which may exceed 25,000) that could be issued upon a
conversion of the Note.

     Section 2(a) of the Note is hereby amended to read in its entirety:

     "(a) Conversion by the Company. At any time any principal is outstanding,
by providing notice in accordance with Section 10 hereof (the "Conversion
Notice") to the Holder, the Company may cause the Holder to convert any portion
or the full amount of the then outstanding principal (the "Conversion
Principal") into that number of shares of the Company's common stock
("Conversion Shares") determined in the manner set forth in Section 2(c)
hereof."

     The Company hereby provides the Conversion Notice to the Holder notifying
the Holder that the Company requests, and the Holder agrees, to convert $6,500
into 25,000 shares of the Company's common stock, based on a Per Share Market
Price of $.26. The Notice Date is the date hereof.

     Except as specifically amended hereby, the Warrant and the Note shall
continue in full force and effect in accordance with their terms.

     Please indicate your agreement with the foregoing by executing the enclosed
copy of this letter and returning it to me.

                                       -1-

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                              MCLAREN PERFORMANCE TECHNOLOGIES, INC.

                              By:/s/ Chris J. Panzl
                                 --------------------------------
                                 Name: Chris J. Panzl
                                 Its: Chief Financial Officer

ACCEPTED AND AGREED:

/s/ Amherst H. Turner
---------------------
Amherst H. Turner

                                       -2-

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