EXHIBIT 4.1







                         ADVANCED ACCESSORY SYSTEMS, LLC

                                       and

                            AAS CAPITAL CORPORATION,

                                   as Issuers,

                                       and

                          THE GUARANTORS PARTY HERETO,

                                  as Guarantors

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


                         10 3/4% Senior Notes due 2011

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


                          FIRST SUPPLEMENTAL INDENTURE

                            Dated as of June 26, 2006

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

                Supplementing the Indenture, dated as of May 23,
           2003, among Advanced Accessory Systems, LLC and AAS Capital
                            Corporation, as Issuers,
     the Guarantors party thereto and BNY Midwest Trust Company, as Trustee
                               -------------------

                           BNY MIDWEST TRUST COMPANY,

                                   as Trustee

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





     FIRST SUPPLEMENTAL  INDENTURE dated as of June 26, 2006 (this "SUPPLEMENTAL
INDENTURE"), to the INDENTURE, dated as of May 23, 2003 (the "INDENTURE"), among
Advanced Accessory  Systems,  LLC, a Delaware limited liability company ("AAS"),
and AAS Capital  Corporation,  a Delaware corporation ("AASC" and, together with
AAS,  the  "ISSUERS"),   the  Guarantors   listed  on  SCHEDULE  A  hereto  (the
"GUARANTORS"),  and BNY Midwest Trust Company,  an Illinois  trust  company,  as
trustee  (the  "TRUSTEE"),  which  governs the terms of the  Issuers' 10 3/4%
Senior Notes due 2011 (the "NOTES").

     WHEREAS,  Section  9.2 of the  Indenture  provides  that the  Issuers,  the
Guarantors  and the  Trustee  may amend the  Indenture  with the  consent of the
Holders of at least a majority in principal amount of the Notes then outstanding
(the "REQUISITE CONSENTS");

     WHEREAS,  pursuant  to the  Offer  to  Purchase  and  Consent  Solicitation
Statement,  dated June 5, 2006,  as  modified  from time to time (the  "OFFER TO
PURCHASE"),  the  Issuers  commenced  a  cash  tender  offer  for  any  and  all
outstanding Notes and solicited  consents from Holders of Notes to amend certain
provisions of the Indenture, as set forth in Article I hereof;

     WHEREAS,  the  Requisite  Consents  to  the  amendments  effected  by  this
Supplemental Indenture have been received; and

     WHEREAS,  this  Supplemental  Indenture  has been  duly  authorized  by all
necessary corporate action on the part of the Issuers.

     NOW,  THEREFORE,  the  Issuers,  the  Guarantors  and the Trustee  agree as
follows for the equal and ratable benefit of the Holders of the Notes:

ARTICLE I

                                   AMENDMENTS

     Section 1.01. AMENDMENTS TO ARTICLE 4.

          a. Upon the  effectiveness of the amendments set forth in this Article
I, each of Section 4.3 (Reports), Section 4.4 (Compliance Certificate),  Section
4.5  (Taxes),  Section  4.6  (Stay,  Extension  and  Usury  Laws),  Section  4.7
(Limitation  on Restricted  Payments),  Section 4.8  (Limitation on Dividend and
Other  Payment  Restrictions  Affecting  Restricted  Subsidiaries),  Section 4.9
(Limitation on Incurrence of Additional Indebtedness), Section 4.11 (Limitations
on Transactions  with Affiliates),  Section 4.12 (Limitation on Liens),  Section
4.14  (Insurance  Matters),  Section  4.15 (Offer to  Repurchase  Upon Change of
Control), Section 4.16 (Additional Subsidiary Guarantees), Section 4.17 (Conduct
of Business),  Section 4.18 (Payments for Consent) and Section 4.19  (Limitation
on Preferred Stock of Restricted Subsidiaries) of the Indenture shall be deleted
in its entirety  and replaced  with the phrase  "[Intentionally  Omitted]."  All
references to such deleted sections shall also be deleted in their entirety.

          b. Upon the effectiveness of the amendments set forth in this Article,
each of clauses (A),  (B), (C), (D), (F), (G), (H) and (I) of Section 4.10 shall
be  deleted  in its  entirety  and  replaced  with  the  phrase  "[Intentionally
Omitted]." All references to such deleted clauses shall also be deleted in their
entirety.

          c. Upon the  effectiveness of the amendments set forth in this Article
I,  Section  4.13  shall  be  deleted  in its  entirety  and  replaced  with the
following:





          "Subject to Article V hereof,  each of the Issuers and the  Guarantors
     shall do or cause to be done all things  necessary  to preserve and keep in
     full force and effect its corporate or other  existence in accordance  with
     the organizational documents (as the same may be amended from time to time)
     of the Issuers or such Guarantor."

     Section  1.02.  AMENDMENTS  TO  ARTICLE  5. Upon the  effectiveness  of the
amendments  set forth in this  Article  I,  Section  5.1 shall be deleted in its
entirety and replaced with the following:

     "Section 5.1. SALE OF ASSETS. In the event of a sale (the "QUALIFIED SALE")
of  substantially  all of the assets of Holdings,  in one or a series of related
transactions,  to Thule Sportrack Beheer B.V. (the "SUCCESSOR GUARANTOR") or its
Affiliates,  (i) the Successor Guarantor shall expressly assume, by supplemental
indenture (in form and substance  reasonably  satisfactory to the Trustee in all
respects),  executed and  delivered to the Trustee,  the  Obligations  under the
Holdings  Guarantee  and the  performance  of  every  covenant  of the  Holdings
Guarantee to be performed or observed,  (ii) the Company  shall remain an Issuer
under this Indenture, (iii) any Person that acquires all or substantially all of
the assets of Valley  Industries,  LLC ("VALLEY")  shall  expressly  assume,  by
supplemental  indenture (in form and substance  reasonably  satisfactory  to the
Trustee in all respects), executed and delivered to the Trustee, the Obligations
of Valley as a Subsidiary  Guarantor and the  performance  of every  covenant of
such  Subsidiary  Guarantee  to be  performed  or  observed,  and (iv) an entity
designated by the Successor  Guarantor (the "SUCCESSOR  ISSUER") shall expressly
assume, by supplemental indenture (in form and substance reasonably satisfactory
to the Trustee in all respects),  executed and delivered to the Trustee,  all of
the Obligations of AAS Capital  Corporation under this Indenture,  whereupon the
Successor  Issuer shall be deemed an Issuer for all  purposes of this  Indenture
and AAS Capital  Corporation  shall be released from its obligations  under this
Indenture. Notwithstanding the provisions of Section 11.4 of this Indenture, any
Subsidiary  Guarantor  that  is no  longer  a  Subsidiary  of the  Company,  the
Successor  Guarantor  or  the  Successor  Issuer  upon  the  effectiveness  of a
Qualified Sale shall be released from its Obligations as a Subsidiary  Guarantor
under this Indenture.  Upon the effectiveness of a Qualified Sale and subject to
compliance   with  the  provisions   contained   herein,(x)   Holdings  will  be
automatically  discharged from all of its  Obligations  under this Indenture and
the Holdings  Guarantee  and (y) this Section 5.1 shall have no further force or
effect."

     Section 1.03. AMENDMENTS TO ARTICLE 6.

          a. Upon the effectiveness of the amendments set forth in this Article,
each of clauses  (c),  (d),  (e) and (h) of Section  6.1 shall be deleted in its
entirety and replaced with the phrase "[Intentionally  Omitted]." All references
to such deleted clauses shall also be deleted in their entirety.

          b. Upon the effectiveness of the amendments set forth in this Article,
clauses  (f) and (g) of  Section  6.1 shall be  deleted  in their  entirety  and
replaced with the following:

          "(f) the Successor Guarantor or the Company:

               (i) commences a voluntary case under any Bankruptcy Law,

               (ii)  consents to the entry of an order for relief  against it in
               an involuntary case,

               (iii)  consents to the  appointment of a custodian or receiver of
               it or for all or substantially, all of its property,

                                      -2-




               (iv) makes a general assignment for the benefit of its creditors,
               or

               (v) generally is not paying its debts as they become due; or

          (g) a court of competent  jurisdiction enters an order or decree under
     any Bankruptcy Law that:

               (i) is for relief in an  involuntary  case against the  Successor
               Guarantor or the Company;

               (ii) appoints a custodian or receiver of the Successor  Guarantor
               or the Company or for all or substantially all of the property of
               any of the foregoing;

               (iii) orders the  liquidation  of the Successor  Guarantor or the
               Company;

     and the order or decree  remains  unstayed and in effect for 60 consecutive
     days."

     Section  1.04.  AMENDMENTS  TO ARTICLE  11. Upon the  effectiveness  of the
amendments  set forth in this Article,  the first  paragraph of Section  11.4(a)
shall be deleted in its entirety and replaced with the following:

     "The  Guarantee  of  a  Subsidiary  Guarantor  will  be  automatically  and
unconditionally  released  without  any action on the part of the Trustee or the
Holders of the Notes:  (1) in connection  with any sale or other  disposition of
all or substantially all of the assets of that Subsidiary Guarantor  (including,
without limitation,  by way of merger or consolidation);  (2) in connection with
any sale of all of the Capital Stock of that Subsidiary  Guarantor;  (3) if that
Subsidiary  Guarantor is designated as an Unrestricted  Subsidiary in accordance
with the  applicable  provisions of this  Indenture;  or (4) upon the payment in
full of the Notes."

     Section 1.05. AMENDMENTS TO THE NOTES.

          a. Upon the effectiveness of the amendments set forth in this Article,
Section 9 of the Notes and  clauses  (iii),  (iv) and (v) of  Section  13 of the
Notes shall be amended and restated in their entirety to read as follows:

          9. "[INTENTIONALLY OMITTED];"

          13. "(iii) [INTENTIONALLY OMITTED];

               (iv) [INTENTIONALLY OMITTED];

               (v) [INTENTIONALLY OMITTED]; and"

          b. Upon the effectiveness of the amendments set forth in this Article,
clause  (iv) of Section 13 of the Notes  shall be amended  and  restated  in its
entirety to read as follows:

          "(vi) certain  events of bankruptcy or insolvency  with respect to the
Issuer."

     Section  1.06.  TRUSTEE'S  ACCEPTANCE.  The  Trustee  hereby  accepts  this
Supplemental  Indenture  and  agrees  to  perform  the same  under the terms and
conditions set forth in the Indenture.


                                      -3-





                                   ARTICLE II

                                  MISCELLANEOUS

     Section  2.01.   INTERPRETATION.   Upon  execution  and  delivery  of  this
Supplemental  Indenture and the  effectiveness  of the  amendments  set forth in
Article I, the Indenture  shall be modified and amended in accordance  with this
Supplemental  Indenture,  and all the terms and conditions of both shall be read
together as though they  constitute  one  instrument,  except  that,  in case of
conflict,  the provisions of this  Supplemental  Indenture  shall  control.  The
Indenture,  as modified and amended by this  Supplemental  Indenture,  is hereby
ratified and confirmed in all respects and shall bind every Holder of Notes.  In
case of conflict  between the terms and  conditions  contained  in the Notes and
those contained in the Indenture,  as modified and amended by this  Supplemental
Indenture,  the  provisions  of the  Indenture,  as modified and amended by this
Supplemental Indenture, shall control.

     Section 2.02.  CONFLICT WITH TRUST  INDENTURE ACT. If any provision of this
Supplemental Indenture limits,  qualifies or conflicts with any provision of the
TIA that is  required  under the TIA to be part of and govern any  provision  of
this  Supplemental  Indenture,  the provision of the TIA shall  control.  If any
provision of this Supplemental  Indenture  modifies or excludes any provision of
the TIA that may be so modified or excluded,  the  provision of the TIA shall be
deemed  to apply to the  Indenture  as so  modified  or to be  excluded  by this
Supplemental Indenture, as the case may be.

     Section  2.03. SEVERABILITY.  In case any  provision in this  Supplemental
Indenture shall be invalid, illegal or unenforceable, the validity, legality and
enforceability  of the remaining  provisions shall not in any way be affected or
impaired thereby.

     Section 2.04.  TERMS DEFINED IN THE INDENTURE.  All  capitalized  terms not
otherwise  defined  herein  shall  have  the  meanings  ascribed  to them in the
Indenture.

     Section  2.05. HEADINGS.   The  Article  and  Section  headings  of  this
Supplemental Indenture have been inserted for convenience of reference only, are
not to be considered a part of this  Supplemental  Indenture and shall in no way
modify or restrict any of the terms or provisions hereof.

     Section 2.06.  BENEFITS OF  SUPPLEMENTAL  INDENTURE,  ETC.  Nothing in this
Supplemental  Indenture  or the  Notes,  express or  implied,  shall give to any
Person, other than the parties hereto and thereto and their successors hereunder
and  thereunder  and the  Holders  of the  Notes,  any  benefit  of any legal or
equitable  right,  remedy  or  claim  under  the  Indenture,  this  Supplemental
Indenture or the Notes.

     Section 2.07. SUCCESSORS.  All agreements of the Issuers and the Guarantors
in this Supplemental  Indenture shall bind their  successors.  All agreements of
the Trustee in this Supplemental Indenture shall bind its successors.

     Section 2.08. TRUSTEE NOT RESPONSIBLE FOR RECITALS.  The recitals contained
herein shall be taken as the  statements of the Issuers and the Trustee  assumes
no responsibility for their correctness. The Trustee makes no representations as
to the validity or sufficiency of this Supplemental Indenture.

     Section  2.09.  CERTAIN  DUTIES AND  RESPONSIBILITIES  OF THE  TRUSTEE.  In
entering into this Supplemental Indenture,  the Trustee shall be entitled to the
benefit of every provision of the Indenture relating to the conduct or affecting
the liability or affording  protection to the Trustee,  whether or not elsewhere
herein so provided.

                                      -4-




     Section 2.10. GOVERNING LAW. THIS SUPPLEMENTAL  INDENTURE SHALL BE GOVERNED
BY, AND  CONSTRUED  IN  ACCORDANCE  WITH,  THE LAWS OF THE STATE OF NEW YORK 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.

     Section  2.11.  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.

     Section 2.12. EFFECTIVENESS OF AMENDMENTS.  The amendments to the Indenture
set forth in Article I shall become  effective  immediately  upon the acceptance
for  payment by the  Issuers  pursuant  to the Offer to  Purchase  of at least a
majority  in  principal  amount of the Notes  then  outstanding  (determined  in
accordance  with the provisions of Sections 2.8 and 2.9 of the Indenture) on the
date hereof.



                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]











                                      -5-







     IN  WITNESS  WHEREOF,  each  party  hereto  has  caused  this  Supplemental
Indenture to be signed by its officer  thereunto duly  authorized as of the date
first written above.


                                 ADVANCED ACCESSORY SYSTEMS, LLC


                                 By: /s/ Ronald J. Gardhouse
                                     ------------------------------------
                                      Name:  Ronald J. Gardhouse
                                      Title: Executive Vice President, Chief
                                             Financial Officer, Controller,
                                             Secretary and Treasurer


                                 AAS CAPITAL CORPORATION


                                 By: /s/ Ronald J. Gardhouse
                                     ------------------------------------
                                      Name:  Ronald J. Gardhouse
                                      Title: Executive Vice President, Chief
                                             Financial Officer, Secretary and
                                             Treasurer


                                 BNY MIDWEST TRUST COMPANY, as Trustee,


                                 By: /s/ Roxane Ellwanger
                                     ------------------------------------
                                      Name:  Roxane Ellwanger
                                      Title: Assistant Vice President





                   [SIGNATURES CONTINUE ON THE FOLLOWING PAGE]






                                      -6-






                                 THE GUARANTORS


                                      CHAAS ACQUISITIONS, LLC


                                      By:    /s/ Ronald J. Gardhouse
                                             --------------------------
                                             Name:  Ronald J. Gardhouse
                                             Title: Executive Vice President,
                                                    Chief Financial Officer and
                                                    Controller


                                      AAS ACQUISITIONS, LLC


                                      By:    /s/ Ronald J. Gardhouse
                                             --------------------------
                                             Name:  Ronald J. Gardhouse
                                             Title: Executive Vice President and
                                                    Chief Financial Officer


                                      VALLEY INDUSTRIES, LLC


                                      By:    /s/ Ronald J. Gardhouse
                                             --------------------------
                                             Name:  Ronald J. Gardhouse
                                             Title: Executive Vice President,
                                                    Chief Financial Officer,
                                                    Secretary and Treasurer


                                      VALTEK LLC


                                      By:    /s/ Ronald J. Gardhouse
                                             --------------------------
                                             Name:  Ronald J. Gardhouse
                                             Title: Executive Vice President,
                                                    Chief Financial Officer,
                                                    Secretary and Treasurer


                                      SPORTRACK, LLC


                                      By:    /s/ Ronald J. Gardhouse
                                             --------------------------
                                             Name:  Ronald J. Gardhouse
                                             Title: Executive Vice President,
                                                    Chief Financial Officer,
                                                    Secretary and Treasurer



                                      -7-






                                                                      SCHEDULE A



CHAAS Acquisitions, LLC
AAS Acquisitions, LLC
Valley Industries, LLC
Valtek LLC
Sportrack, LLC