EXHIBIT 4.1.4

                         FOURTH SUPPLEMENTAL INDENTURE

     Fourth Supplemental Indenture (this "Fourth Supplemental Indenture"), dated
as of April 20, 1999 among Active Gear, L.L.C. ("Active Gear") (the
"Guarantor"), the Company (as defined in the Indenture referred to herein), any
other Guarantors (as defined in the Indenture referred to herein) party thereto,
any Parent (as defined in the Indenture referred to herein) party thereto and
U.S. Trust Company, 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 has heretofore executed and delivered to the Trustee
an indenture, dated as of July 31, 1998 as supplemented by the First
Supplemental Indenture dated September 30, 1998; the Second Supplemental
Indenture dated December 21, 1998; and the Third Supplemental Indenture dated
January 14, 1999 (as supplemented, the "Indenture") providing for the issuance
of 12% Senior Subordinated Notes due 2005 (the "Notes");

     WHEREAS, the Indenture provides that under certain circumstances the
Guarantors shall execute and deliver to the Trustee a supplemental indenture
pursuant to which subsequent Guarantors shall unconditionally guarantee all of
the Company's Obligations under the Notes and the Indenture on the terms and
conditions set forth herein (the "Guarantee"); and

     WHEREAS, pursuant to Section 9.1 of the Indenture, the Trustee is
authorized to execute and deliver this Fourth Supplemental Indenture.

     NOW THEREFORE, in consideration of the foregoing and for other good and
valuable consideration, the receipt of which is hereby acknowledged, the
Guarantors and the Trustee mutually covenant and agree of 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. Each of the Guarantors irrevocably and
unconditionally guarantees the Guarantee Obligations, which include (i) the due
and punctual payment of the principal of, premium, if any, and interest and
Liquidated Damages, if any, on the Notes, whether at stated maturity, by
acceleration or otherwise, the due and punctual payment of interest on the
overdue principal and premium, if any, and (to the extent permitted by law)
interest on any interest and Liquidated Damages, if any, on the Notes, and the
due and punctual performance of all other obligations of the Company, to the
Holders or the Trustee all in accordance with the terms set forth in Article XI
of the Indenture, and (ii) in case of any extension of time of payment or
renewal of any Notes or any such other obligations, that 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.


     The obligations of the Guarantors to the Holders and to the Trustee
pursuant to this Guarantee and the Indenture are expressly set forth in Article
XI of the Indenture and reference is hereby made to such Indenture for the
precise terms of this Guarantee.

     No stockholder, employee, officer, director or incorporator, as such, past,
present or future of the Guarantors shall have any liability under this
Guarantee by reason of his or its status as such stockholder, employee, officer,
director or incorporator.

     This is a continuing Guarantee and shall remain in full force and effect
and shall be binding upon the Guarantors and their respective successors and
assigns until full and final payment of all of the Company's obligations under
the Notes and Indenture or until released in accordance with the Indenture and
shall inure to the benefit of the successors and assigns of the Trustee and the
Holders, and, in the event of any transfer or assignment of rights by any Holder
or the Trustee, the rights and privileges herein conferred upon that party shall
automatically extend to and be vested in such transferee or assignee, all
subject to the terms and conditions hereof. This is a Guarantee of payment and
not of collectibility.

     The Obligations of the Guarantors under its Guarantee shall be limited to
the extent necessary to insure that it does not constitute a fraudulent
conveyance under applicable law.

     THE TERMS OF ARTICLE XI OF THE INDENTURE ARE INCORPORATED HEREIN BY
REFERENCE.

     3.   THIS FOURTH SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY AND CONSTRUED
IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK INCLUDING, WITHOUT
LIMITATION, SECTION 5-1401 OF THE NEW YORK GENERAL OBLIGATIONS LAW.

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

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

                                       2


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

                              HDA PARTS SYSTEM, INC., an Alabama corporation


                              By:    /s/ John J. Greisch
                                  --------------------------------------------
                                  Name:  John J. Greisch
                                  Title: President and Chief Executive Officer


                              CITY TRUCK AND TRAILER PARTS OF ALABAMA,
                                  INC., an Alabama corporation

                              By:    /s/ John J. Greisch
                                  --------------------------------------------
                                  Name:  John J. Greisch
                                  Title: Vice President


                              CITY TRUCK AND TRAILER PARTS OF ALABAMA,
                                  L.L.C., an Alabama limited liability company

                              HDA PARTS SYSTEM, INC., as sole member

                              By:    /s/ John J. Greisch
                                  --------------------------------------------
                                  Name:  John J. Greisch
                                  Title: President and Chief Executive Officer


                              CITY TRUCK AND TRAILER PARTS OF TENNESSEE,
                                  INC., a Tennessee corporation


                              By:    /s/ John J. Greisch
                                  --------------------------------------------
                                  Name:  John J. Greisch
                                  Title: Vice President


                              CITY FRICTION, INC., an Alabama corporation


                              By:    /s/ John J. Greisch
                                  --------------------------------------------
                                  Name:  John J. Greisch
                                  Title: Vice President



                              TRUCK & TRAILER PARTS, INC., a Georgia
                                  corporation, as Guarantor


                              By:    /s/ John J. Greisch
                                  --------------------------------------------
                                  Name:  John J. Greisch
                                  Title: Vice President


                              CITY TRUCK HOLDINGS, INC., a Delaware corporation
                                  as Guarantor


                              By:    /s/ John J. Greisch
                                  --------------------------------------------
                                  Name:  John J. Greisch
                                  Title: President and Chief Executive Officer


                              TRUCKPARTS, INC., a Connecticut corporation,
                                  as Guarantor


                              By:    /s/ John J. Greisch
                                  --------------------------------------------
                                  Name:  John J. Greisch
                                  Title: Vice President


                              ASSOCIATED BRAKE SUPPLY, INC., a California
                                  corporation, as Guarantor


                              By:    /s/ John J. Greisch
                                  --------------------------------------------
                                  Name:  John J. Greisch
                                  Title: Vice President


                              ASSOCIATED TRUCK CENTER, INC., a California
                                  corporation, as Guarantor


                              By:    /s/ John J. Greisch
                                  --------------------------------------------
                                  Name:  John J. Greisch
                                  Title: Vice President


                             ASSOCIATED TRUCK PARTS OF NEVADA, INC.,
                                 a Nevada corporation, as Guarantor

                             By:    /s/ John J. Greisch
                                 --------------------------------------------
                                 Name:  John J. Greisch
                                 Title: Vice President

                             ONYX DISTRIBUTION, INC., a California corporation,
                                 as Guarantor

                             By:    /s/ John J. Greisch
                                 --------------------------------------------
                                 Name:  John J. Greisch
                                 Title: Vice President

                             FREEWAY TRUCK PARTS OF WASHINGTON, INC., a
                                 Washington corporation, as Guarantor

                             By:    /s/ John J. Greisch
                                 --------------------------------------------
                                 Name:  John J. Greisch
                                 Title: Vice President

                             TISCO, INC., a California corporation, as Guarantor


                             By:    /s/ John J. Greisch
                                 --------------------------------------------
                                 Name:  John J. Greisch
                                 Title: Vice President

                             TISCO OF REDDING, INC., a California corporation,
                                 as Guarantor

                             By:    /s/ John J. Greisch
                                 --------------------------------------------
                                 Name:  John J. Greisch
                                 Title: Vice President


                         U.S. TRUST COMPANY, NATIONAL ASSOCIATION,
                             as Trustee

                         By:    /s/ Sandee Parks
                             -------------------------------------------------
                             Name:  Sandee Parks
                             Title: Vice President

                         ACTIVE GEAR, L.L.C., a Washington limited liability
                             company, as Guarantor

                         HDA PARTS SYSTEM, INC., as sole member

                         By:    /s/ John J. Greisch
                             -------------------------------------------------
                             Name:  John J. Greisch
                             Title: President and Chief Executive Officer


                         U.S. TRUST COMPANY, NATIONAL ASSOCIATION,
                             as Trustee

                         By:    /s/ Sandee Parks
                             -------------------------------------------------
                             Name:  Sandee Parks
                             Title: Vice President

                         ACTIVE GEAR, L.L.C., a Washington limited liability
                             company, as Guarantor

                         HDA PARTS SYSTEM, INC., as sole member

                         By:    /s/ John J. Greisch
                             -------------------------------------------------
                             Name:  John J. Greisch
                             Title: President and Chief Executive Officer