<SUBMISSION>
<ACCESSION-NUMBER>0000950153-06-001980
<TYPE>8-K
<PUBLIC-DOCUMENT-COUNT>3
<PERIOD>20060727
<ITEMS>1.01
<ITEMS>7.01
<ITEMS>9.01
<FILING-DATE>20060731
<DATE-OF-FILING-DATE-CHANGE>20060731
<FILER>
<COMPANY-DATA>
<CONFORMED-NAME>CSK AUTO CORP
<CIK>0001051848
<ASSIGNED-SIC>5531
<IRS-NUMBER>860765798
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>0131
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>8-K
<ACT>34
<FILE-NUMBER>001-13927
<FILM-NUMBER>06991140
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>645 E MISSOURI AVENUE
<CITY>PHOENIX
<STATE>AZ
<ZIP>85012
<PHONE>6022659200
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>645 E MISSOURI AVENUE
<CITY>PHOENIX
<STATE>AZ
<ZIP>85012
</MAIL-ADDRESS>
</FILER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>p72673e8vk.htm
<DESCRIPTION>8-K
<TEXT>
<HTML>
<HEAD>
<TITLE>e8vk</TITLE>
</HEAD>
<BODY bgcolor="#FFFFFF">
<!-- PAGEBREAK -->
<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>
<DIV style="font-family: 'Times New Roman',Times,serif">




<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 1pt solid black; font-size: 1pt">&nbsp;</DIV>




<DIV align="center" style="font-size: 14pt; margin-top: 12pt"><B>UNITED STATES SECURITIES AND EXCHANGE COMMISSION</B>
</DIV>

<DIV align="center" style="font-size: 12pt"><B>Washington, D.C. 20549</B>
</DIV>

<DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 20%; border-top: 1px solid #000000">&nbsp;</DIV></DIV>

<DIV align="center" style="font-size: 18pt; margin-top: 12pt"><B>FORM 8-K</B>
</DIV>


<DIV align="center" style="font-size: 12pt; margin-top: 12pt"><B>CURRENT REPORT PURSUANT<BR>
TO SECTION 13 OR 15 (d)&nbsp;OF THE<BR>
SECURITIES EXCHANGE ACT OF 1934</B>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>Date of report (Date of earliest event reported): July&nbsp;27, 2006</B></DIV>

<DIV align="center" style="font-size: 24pt; margin-top: 12pt"><B>CSK AUTO CORPORATION</B>
</DIV>

<DIV align="center" style="font-size: 10pt"><B>(Exact name of registrant as specified in its charter)</B></DIV>


<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="30%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="30%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="30%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top"><B>Delaware</B>
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><B>001-13927</B>
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><B>86-0765798</B></TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">(State or Other Jurisdiction of
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(Commission File Number)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(I.R.S. Employer</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">Incorporation)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Identification No.)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="47%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="47%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top"><B>645 E. Missouri Ave. Suite&nbsp;400, Phoenix, Arizona</B>
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><B>85012</B></TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">(Address of Principal Executive Offices)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(Zip Code)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Registrant&#146;s Telephone Number, Including Area Code: (602)&nbsp;265-9200</B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Check the appropriate box below if the Form 8-K is intended to simultaneously satisfy the filing
obligation of the registrant under any of the following provisions:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face="Wingdings">&#111;</FONT> Written communications pursuant to Rule&nbsp;425 under the Securities Act (17 CFR 230.425)
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face="Wingdings">&#111;</FONT> Soliciting material pursuant to Rule&nbsp;14a-12 under the Exchange Act (17 CFR 240.14a-12)
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face="Wingdings">&#111;</FONT> Pre-commencement communications pursuant to Rule&nbsp;14d-2(b) under the Exchange Act (17 CFR
240.14d-2(b))
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face="Wingdings">&#111;</FONT> Pre-commencement communications pursuant to Rule&nbsp;13e-4(c) under the Exchange Act (17 CFR
240.13e-4(c))
</DIV>

<DIV style="width: 100%; border-bottom: 1pt solid black; margin-top: 10pt; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>





<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">

<!-- TOC -->
<A name="toc"><DIV align="CENTER" style="page-break-before:always"><U><B>TABLE OF CONTENTS</B></U></DIV></A>

<P><CENTER>
<TABLE border="0" width="90%" cellpadding="0" cellspacing="0">
<TR>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="76%"></TD>
</TR>
<TR><TD colspan="9"><A HREF="#000">Item&nbsp;1.01. Entry into a Material Definitive Agreement</A></TD></TR>
<TR><TD colspan="9"><A HREF="#001">Item&nbsp;7.01. Regulation&nbsp;FD Disclosure</A></TD></TR>
<TR><TD colspan="9"><A HREF="#002">Item&nbsp;9.01. Financial Statements and Exhibits</A></TD></TR>
<TR><TD colspan="9"><A HREF="#003">SIGNATURE</A></TD></TR>
<TR><TD colspan="9"><A HREF="#004">EXHIBIT INDEX</A></TD></TR>
<TR><TD colspan="9"><A HREF="p72673exv4w1.htm">Exhibit 4.1</A></TD></TR>
<TR><TD colspan="9"><A HREF="p72673exv99w1.htm">Exhibit 99.1</A></TD></TR>
</TABLE>
</CENTER>
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<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>




<!-- link1 "Item&nbsp;1.01. Entry into a Material Definitive Agreement" -->
<DIV align="left"><A NAME="000"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;1.01. Entry into a Material Definitive Agreement.</B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">On July&nbsp;27, 2006, CSK Auto, Inc. (&#147;Auto&#148;), a wholly owned subsidiary of CSK Auto Corporation (the
&#147;Company&#148;), entered into a Second Supplemental Indenture (the &#147;Second Supplemental Indenture&#148;)
among Auto, the Company, CSKAUTO.COM, Inc. (&#147;AUTO.COM&#148;), and The Bank of New York Trust Company,
N.A. (the &#147;Trustee&#148;), which amends the Indenture, dated as of December&nbsp;19, 2005, among Auto, the
Company, AUTO.COM and the Trustee (as previously supplemented, the &#147;Indenture&#148;) governing Auto&#146;s
4<FONT style="font-size: 70%"><SUP>5</SUP></FONT>/<FONT style="font-size: 60%">8</FONT>% Senior Exchangeable Notes due 2025 (the &#147;Notes&#148;). The Second Supplemental Indenture provides
that, among other things, any documents and reports that Auto would have been required to file with
the SEC or the Trustee for the Notes on any date on or before June&nbsp;30, 2007 shall not be required
to be filed until such date.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">The Second Supplemental Indenture also provides that effective July&nbsp;27, 2006, the interest rate of
the Notes will increase to 6.75% per year to, but excluding December&nbsp;15, 2010, and 6.50% per year
thereafter. The exchange rate of the Notes was also increased effective July&nbsp;27, 2006 from 49.8473
shares of the Company&#146;s common stock per $1,000 principal amount of Notes to 60.6061 shares of the
Company&#146;s common stock per $1,000 principal amount of Notes.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">The foregoing description does not purport to be complete and is qualified in its entirety by
reference to the text of the Second Supplemental Indenture, which is attached hereto as Exhibit&nbsp;4.1
and is incorporated herein by reference.
</DIV>

<!-- link1 "Item&nbsp;7.01. Regulation&nbsp;FD Disclosure" -->
<DIV align="left"><A NAME="001"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;7.01. Regulation&nbsp;FD Disclosure.</B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">On July&nbsp;27, 2006, the Company issued a press release announcing that Auto had obtained a waiver of
the previously announced default under the Indenture and had entered into an agreement to amend
certain terms of the Notes and the Indenture. The press release is attached hereto as Exhibit&nbsp;99.1.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">The information furnished under this Item&nbsp;7.01 and in the Exhibit&nbsp;99.1 attached hereto is intended
to be furnished and is supplemental to the information filed under Item&nbsp;1.01 in this report, and
shall not be deemed to be &#147;filed&#148; for the purposes of Section&nbsp;18 of the Securities Exchange Act of
1934, as amended, or otherwise subject to the liabilities of that section, nor shall such
information be deemed incorporated by reference in any filing under the Securities Act of 1933, as
amended, except as shall be expressly set forth by specific release in such a filing.
</DIV>

<!-- link1 "Item&nbsp;9.01. Financial Statements and Exhibits" -->
<DIV align="left"><A NAME="002"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;9.01. Financial Statements and Exhibits.</B>
</DIV>



<DIV align="left" style="font-size: 10pt; margin-top: 6pt">(d)&nbsp;Exhibits
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="10%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="88%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Exhibit No.</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Description</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Second Supplemental Indenture, dated as of July&nbsp;27, 2006,
among CSK Auto, Inc., CSK Auto Corporation, CSKAUTO.COM, Inc.,
and The Bank of New York Trust Company, N.A.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Press release dated July&nbsp;27, 2006.</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>



<P align="center" style="font-size: 10pt">2
</DIV>

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<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">



<!-- link1 "SIGNATURE" -->
<DIV align="left"><A NAME="003"></A></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>SIGNATURE</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly
caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
</DIV>
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="50%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="31%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="bottom">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="3" valign="top" align="center">CSK Auto Corporation<BR></TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="bottom">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="bottom">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">By:
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">/s/ Randi Val Morrison</TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="bottom">&nbsp;</TD>
</TR>
<TR style="font-size: 1px">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="bottom">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="3" valign="top" align="center">Randi Val Morrison<BR></TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="bottom">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="3" valign="top" align="center">Vice President, General Counsel and<BR></TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="bottom">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="3" valign="top" align="center">Secretary<BR></TD>
    <TD>&nbsp;</TD>
    <TD align="right" valign="bottom">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 12pt">DATED:
July&nbsp;31, 2006
</DIV>



<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">



<!-- link1 "EXHIBIT INDEX" -->
<DIV align="left"><A NAME="004"></A></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>EXHIBIT INDEX</B>
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="10%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="88%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Exhibit No.</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000"><B>Description</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Second Supplemental Indenture, dated as of July&nbsp;27, 2006,
among CSK Auto, Inc., CSK Auto Corporation, CSKAUTO.COM, Inc.,
and The Bank of New York Trust Company, N.A.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Press release dated July&nbsp;27, 2006.</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>



<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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<DOCUMENT>
<TYPE>EX-4.1
<SEQUENCE>2
<FILENAME>p72673exv4w1.htm
<DESCRIPTION>EXHIBIT 4.1
<TEXT>
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<TITLE>exv4w1</TITLE>
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<DIV style="font-family: 'Times New Roman',Times,serif">




<DIV align="right" style="font-size: 10pt; margin-top: 12pt">Exhibit&nbsp;4.1
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>CSK AUTO, INC.<BR>
4<FONT style="font-size: 70%"><SUP>5</SUP></FONT>/<FONT style="font-size: 60%">8</FONT>% Senior Exchangeable Notes due 2025</B>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV>
</DIV>


<DIV align="Center" style="font-size: 10pt; margin-top: 6pt"><B>SECOND SUPPLEMENTAL INDENTURE</B>

</DIV>

<DIV align="Center" style="font-size: 10pt; margin-top: 6pt"><B>Dated as of July&nbsp;27, 2006</B>

</DIV>

<DIV align="Center" style="font-size: 10pt; margin-top: 6pt"><B>with respect to the</B>

</DIV>

<DIV align="Center" style="font-size: 10pt; margin-top: 6pt"><B>INDENTURE</B>

</DIV>

<DIV align="Center" style="font-size: 10pt; margin-top: 6pt"><B>Dated as of December&nbsp;19, 2005</B>

</DIV>

<DIV align="Center" style="font-size: 10pt; margin-top: 6pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV>

</DIV>

<DIV align="Center" style="font-size: 10pt; margin-top: 6pt"><B>THE BANK OF NEW YORK TRUST COMPANY, N.A.,<BR>
as Trustee</B>

</DIV>

<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>SECOND SUPPLEMENTAL INDENTURE</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SECOND SUPPLEMENTAL INDENTURE dated as of July&nbsp;27, 2006 (this <I>&#147;Supplemental Indenture&#148;</I>) among
CSK Auto, Inc., an Arizona corporation (the &#147;<I>Company</I>&#148;), CSK Auto Corporation, a Delaware
corporation and the parent of the Company (the &#147;<I>Issuer</I>&#148;), CSKAUTO.COM, Inc., a Delaware corporation
(the &#147;<I>Subsidiary Guarantor</I>&#148;), and The Bank of New York Trust Company, N.A., a national banking
association, as trustee under the indenture referred to below (the &#147;<I>Trustee</I>&#148;).
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>WITNESSETH</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A.&nbsp;WHEREAS, the Company, the Issuer and the existing Subsidiary Guarantor have heretofore
executed and delivered to the Trustee an Indenture (as amended, supplemented or otherwise modified,
the &#147;<I>Indenture</I>&#148;) dated as of December&nbsp;19, 2005, providing for the issuance of the Company&#146;s 4<FONT style="font-size: 70%"><SUP>5</SUP></FONT>/<FONT style="font-size: 60%">8</FONT>%
Senior Exchangeable Notes due 2025 (the &#147;<I>Notes</I>&#148;), initially in the aggregate principal amount of up
to $100,000,000.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;B.&nbsp;WHEREAS, pursuant to and in accordance with Section&nbsp;10.02 of the Indenture, the Company has
obtained, on the date hereof, the consent of the holders of the Notes representing not less than a
majority in aggregate Principal Amount of the outstanding Notes to the amendments to the Indenture
set forth in this Supplemental Indenture.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;NOW, THEREFORE, in consideration of the foregoing and for other good and valuable
consideration, the receipt of which is hereby acknowledged, it is mutually covenanted and agreed
for the equal and ratable benefit of the holders of the Notes as follows:
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SECTION 1. <U>Defined Terms</U><I>. </I>As used in this Supplemental Indenture, terms defined in
the Indenture or in the preamble or recital hereto are used herein as therein defined. The words
&#147;herein,&#148; &#147;hereof&#148; and hereby and other words of similar import used in this Supplemental Indenture
refer to this Supplemental Indenture as a whole and not to any particular section hereof.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SECTION 2. <U>Amendments to Indenture</U><I>. </I>At such time as the Company delivers written
notice to the Trustee and The Altman Group, Inc., the Depositary for the Notes for purposes of a
tender offer and consent solicitation for the Notes, that Notes representing at least a majority in
aggregate Principal Amount of outstanding Notes not owned by the Company or its Affiliates tendered
(and not validly withdrawn) have been accepted pursuant to the Company&#146;s Letter of Consent and
Waiver dated July&nbsp;27, 2006:
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(a)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The following defined term will be added to Section&nbsp;1.01 of the Indenture in
the appropriate alphabetical order:</TD>
</TR>

</TABLE>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&#147;<B>Covenant Reversion Date</B>&#148; means 11:59&nbsp;p.m., New York City time,
on June&nbsp;30, 2007.
</DIV>

<P align="center" style="font-size: 10pt">2
</DIV>

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<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(b)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The definition of &#147;Exchange Price&#148; in Section&nbsp;1.01 of the Indenture shall be
amended by deleting the text of such definition in its entirety and replacing it with
the following text:</TD>
</TR>

</TABLE>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&#147;<B>Exchange Price</B>&#148; as of any day means the Principal Amount
divided by the Exchange Rate as of such date and rounded to the
nearest cent. The Exchange Price shall be $16.50 per share of
Common Stock as of July&nbsp;27, 2006.
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(c)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Section&nbsp;4.06 of the Indenture shall be amended by deleting the text of such Section in
its entirety and replacing it with the following text:</TD>
</TR>

</TABLE>
</DIV>



<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section&nbsp;4.06. <I>Rule&nbsp;144A Information Requirement</I>. Within the
period prior to the expiration of the holding period applicable to
sales thereof under Rule 144(k) under the Securities Act (or any
successor provision), the Company and the Issuer covenant and agree
that they shall, during any period in which neither the Company nor
the Issuer is subject to Section&nbsp;13 or 15(d) under the Exchange Act,
make available to any holder or beneficial holder of Notes or any
Common Stock issued upon exchange thereof which continue to be
Restricted Securities in connection with any sale thereof and any
prospective purchaser of Notes or such Common Stock designated by
such holder or beneficial holder, the information required pursuant
to Rule&nbsp;144A(d)(4) under the Securities Act upon the request of any
holder or beneficial holder of the Notes or such Common Stock and it
will take such further action as any holder or beneficial holder of
such Notes or such Common Stock may reasonably request, all to the
extent required from time to time to enable such holder or
beneficial holder to sell its Notes or Common Stock without
registration under the Securities Act within the limitation of the
exemption provided by Rule&nbsp;144A, as such Rule may be amended from
time to time. Upon the request of any holder or any beneficial
holder of the Notes or such Common Stock, the Company and the Issuer
will deliver to such holder a written statement as to whether it has
complied with such requirements.
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(d)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Section&nbsp;4.08 of the Indenture shall be amended by deleting the text of such Section in
its entirety and replacing it with the following text:</TD>
</TR>

</TABLE>
</DIV>




<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section&nbsp;4.08. <I>Compliance Certificate</I>. The Company shall,
except as otherwise provided in this Section&nbsp;4.08, deliver to the
Trustee, within one hundred twenty calendar days after the end of
each fiscal year of the Company (which fiscal year of the Company
presently ends on the Sunday nearest to January&nbsp;31), a certificate
signed by either the principal executive officer, principal
financial officer or principal accounting officer of the Company,
</DIV>

<P align="center" style="font-size: 10pt">3
</DIV>

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<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">



<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">stating whether or not to the best knowledge of the signer
thereof the Company or the Issuer is in default in the performance
and observance of any of the terms, provisions and conditions of
this Indenture (without regard to any period of grace or requirement
of notice provided hereunder) and, if the Company or the Issuer
shall be in default, specifying all such defaults and the nature and
the status thereof of which the signer may have knowledge (such
certificate, a &#147;Compliance Certificate&#148;).
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Company will, except as otherwise provided in this Section
4.08, deliver to the Trustee, promptly upon becoming aware of (i)
any default in the performance or observance of any covenant,
agreement or condition contained in this Indenture, or (ii)&nbsp;any
Event of Default, an Officers&#146; Certificate specifying with
particularity such default or Event of Default and further stating
what action the Company or the Issuer has taken, is taking or
proposes to take with respect thereto (such certificate, a &#147;Default
Certificate&#148;).
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Any notice required to be given under this Section&nbsp;4.08 shall
be delivered to a Responsible Officer of the Trustee at its
Corporate Trust Office.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Notwithstanding any other provision of this Section&nbsp;4.08 or
this Indenture, (i)&nbsp;the Compliance Certificate that the Company
would have been required (but for this sentence) to deliver pursuant
to this Section&nbsp;4.08 at any time before the Covenant Reversion Date
shall not be required to be delivered for failure of the Company to
comply with Sections&nbsp;4.08 or 5.04 of this Indenture until the
Covenant Reversion Date, and (ii)&nbsp;the Company shall have no
obligation to deliver a Default Certificate pursuant to this Section
4.08 relating to the default in the performance or breach of any
covenant contained in Sections&nbsp;4.08 or 5.04 of this Indenture that
occurred prior to the Covenant Reversion Date.
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(e)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Section&nbsp;5.04 of the Indenture shall be amended by deleting the text of such Section in
its entirety and replacing it with the following text:</TD>
</TR>
</table></div>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section&nbsp;5.04. <I>Reports by Company</I>. The Company shall, except
as otherwise provided in this Section&nbsp;5.04, file with the Trustee
(and the Commission if at any time after the Indenture becomes
qualified under the Trust Indenture Act), and transmit to holders of
Notes, such information, documents and other reports and such
summaries thereof, as may be required pursuant to the Trust
Indenture Act at the times and in the manner provided pursuant to
such Act, whether or not the Notes are governed by such Act;
provided that any such information, documents or
</DIV>

<P align="center" style="font-size: 10pt">4
</DIV>

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<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">



<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">reports required to be filed with the Commission pursuant to
Section&nbsp;13 or 15(d) of the Exchange Act shall, unless such
information, documents or reports are available on the Commission&#146;s
EDGAR filing system (or any successor thereto) be filed with the
Trustee within fifteen calendar days after the same is so required
to be filed with the Commission. Delivery of such reports,
information and documents to the Trustee is for informational
purposes only and the Trustee&#146;s receipt of such shall not constitute
constructive notice of any information contained therein or
determinable from information contained therein, including the
Company&#146;s compliance with any of its covenants hereunder (as to
which the Trustee is entitled to rely exclusively on Officers&#146;
Certificates). Notwithstanding any other provision of this Section
5.04 or this Indenture, the documents and reports referred to in
this Section&nbsp;5.04 that the Company would have been required to file
with the Commission or the Trustee on any date on or before the
Covenant Reversion Date (but for this sentence) will not be required
to be filed by the Company until the Covenant Reversion Date.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 2%">(f)&nbsp;&nbsp;&nbsp;&nbsp;Subclause (e)&nbsp;of Section&nbsp;6.01 of the Indenture shall be amended by deleting the text of
such Subclause in its entirety and replacing it with the following text:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(e) failure on the part of the Company duly to observe or
perform any other of the terms, covenants or agreements on the part
of the Company in the Notes or this Indenture (other than a covenant
or agreement a default in whose performance or whose breach is
elsewhere in this Section&nbsp;6.01 specifically dealt with) continued
for a period of 60 calendar days after the date on which written
notice of such failure, requiring the Company to remedy the same,
shall have been given to the Company by the Trustee, or to the
Company and a Responsible Officer of the Trustee by the holders of
at least 25% in aggregate Principal Amount of the Notes at the time
outstanding determined in accordance with Section&nbsp;8.04; <I>provided,
however</I>, that notwithstanding any of the foregoing or any other
provision of this Indenture, the failure of the Company to comply
with Sections&nbsp;4.08 or 5.04 of this Indenture, and Section 314(a) of
the Trust Indenture Act, at any time before the Covenant Reversion
Date, shall not constitute a default or an Event of Default under
this clause (e); or
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 2%">(g)&nbsp;&nbsp;&nbsp;The first paragraph of Subclause (e)&nbsp;of Section&nbsp;14.01 of the Indenture shall be amended
by deleting the text of such paragraph in its entirety and replacing it with the following
text:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(e) If a Noteholder elects to exchange its notes in connection
with a specified corporate transaction pursuant to
</DIV>

<P align="center" style="font-size: 10pt">5
</DIV>

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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">



<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">Section&nbsp;14.01(b) that occurs prior to December&nbsp;15, 2010, and
the corporate transaction also constitutes a Fundamental Change as
described in clause (i)&nbsp;or (ii)&nbsp;of the definition thereof, subject
to Section&nbsp;14.07, the Exchange Rate shall be increased by an
additional number of shares of Common Stock (the &#147;Additional
Shares&#148;) as described below, <I>provided </I>that if the Stock Price is
greater than $60.00 or less than $12.00 (subject in each case to
adjustment as described below), the number of Additional Shares
shall be zero. Notwithstanding the foregoing, in no event will the
Exchange Rate be increased pursuant to this Section&nbsp;14.01(e) to a
rate that would exceed 83.3333 shares, subject to adjustments in the
same manner as the Exchange Rate as set forth in Section&nbsp;14.05 per
$1,000 Principal Amount of Notes.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 2%">(h)&nbsp;&nbsp;&nbsp;&nbsp;Section&nbsp;14.04 of the Indenture shall be amended by deleting the text of such Section in
its entirety and replacing it with the following text:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section&nbsp;14.04. <I>Exchange Rate. </I>Each $1,000 Principal Amount of
the Notes shall be exchangeable into the number of shares of Common
Stock specified in the form of Note (herein called the &#147;Exchange
Rate&#148;) attached as Exhibit&nbsp;A hereto (as of July&nbsp;27, 2006, 60.6061
shares), subject to adjustment as provided in this Article&nbsp;14.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 2%">(i)&nbsp;Schedule&nbsp;A of the Indenture shall be amended by deleting the text of such Schedule in
its entirety and replacing it with the following text:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The following table sets forth the number of Additional Shares
to be received per $1,000 Principal Amount of Notes pursuant to
Section&nbsp;14.01(e) of this Indenture:
</DIV>
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="16%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="7" style="border-bottom: 0px solid #000000">Stock Price</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left">Effective Date</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">$12.00</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">$16.00</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">$20.00</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">$24.00</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">$28.00</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">$32.00</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">$36.00</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">$40.00</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">$44.00</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">$48.00</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">$52.00</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">$56.00</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="3">$60.00</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR style="font-size: 1px">
    <TD colspan="53" align="left" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>
<TR valign="bottom" style="background: #cceeff">
    <TD nowrap><DIV style="margin-left:15px; text-indent:-15px">December&nbsp;15, 2006</DIV></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">22.7273</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">13.6844</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">9.2207</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">7.6839</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">6.5862</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">5.7629</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">5.1226</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">4.6103</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">4.1912</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">3.8420</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">3.5464</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">3.2931</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0.0000</TD>
    <TD>&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD><DIV style="margin-left:15px; text-indent:-15px">December&nbsp;15, 2007</DIV></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">22.7273</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">11.5151</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">7.8184</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">6.5153</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">5.5845</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">4.8865</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">4.3435</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">3.9092</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">3.5538</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">3.2576</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">3.0071</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">2.7923</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0.0000</TD>
    <TD>&nbsp;</TD>
</TR>
<TR valign="bottom" style="background: #cceeff">
    <TD><DIV style="margin-left:15px; text-indent:-15px">December&nbsp;15, 2008</DIV></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">22.7273</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">8.9399</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">5.7870</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">4.8225</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">4.1336</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">3.6169</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">3.2150</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">2.8935</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">2.6305</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">2.4113</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">2.2258</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">2.0668</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0.0000</TD>
    <TD>&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD><DIV style="margin-left:15px; text-indent:-15px">December&nbsp;15, 2009</DIV></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">22.7273</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">5.7986</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">3.1542</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">2.6285</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">2.2530</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">1.9714</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">1.7523</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">1.5771</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">1.4337</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">1.3143</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">1.2132</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">1.1265</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0.0000</TD>
    <TD>&nbsp;</TD>
</TR>
<TR valign="bottom" style="background: #cceeff">
    <TD><DIV style="margin-left:15px; text-indent:-15px">December&nbsp;15, 2010</DIV></TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0.000</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0.0000</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0.0000</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0.0000</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0.0000</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0.0000</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0.0000</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0.0000</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0.0000</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0.0000</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0.0000</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0.0000</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="right">0.0000</TD>
    <TD>&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(j)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The first sentence of the Note shall be amended by deleting the text of such
sentence in its entirety and replacing it with the following text:</TD>
</TR>

</TABLE>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 6%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;CSK Auto, Inc., a corporation duly organized and validly
existing under the laws of the State of Arizona (herein called the
&#147;Company&#148;, which term includes any successor corporation under the
Indenture referred to on the reverse hereof), for value received
hereby promises to pay to or its registered assigns, &#091;the
Principal Amount of Dollars<SUP style="font-size: 85%; vertical-align: text-top">1</SUP> ($ )&#093; &#091;the Principal
Amount of Dollars ($ ) or such amount as is indicated in the
records of the
</DIV>


<P align="center" style="font-size: 10pt">6
</DIV>

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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>
<DIV style="font-family: 'Times New Roman',Times,serif">




<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Trustee and the Depositary<SUP style="font-size: 85%; vertical-align: text-top">2</SUP>&#093; on December&nbsp;15, 2025,
and to pay interest thereon from December&nbsp;19, 2005 or from the most
recent Interest Payment Date to which Interest has been paid or duly
provided for, on December&nbsp;15 and June&nbsp;15 of each year (each, an
&#147;Interest Payment Date&#148;), commencing on June&nbsp;15, 2006, at the rate
of (i)&nbsp;4.625% per annum for the period from and including December
19, 2005 to, but excluding July&nbsp;27, 2006, (ii)&nbsp;6.75% from and
including July&nbsp;27, 2006 to, but excluding December&nbsp;15, 2010, and
(iii)&nbsp;6.50% per annum thereafter, until the Principal Amount is paid
or made available for payment at December&nbsp;15, 2025 or upon
acceleration, or until such date on which the Notes are exchanged or
repurchased as provided herein, and at the rate of 6.75% per annum
on any overdue principal and on any overdue installment of Interest.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(k)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>All other references in the Note to &#147;4<FONT style="font-size: 70%"><SUP>5</SUP></FONT>/<FONT style="font-size: 60%">8</FONT>%&#148; shall be changed &#147;6<FONT style="font-size: 70%"><SUP>3</SUP></FONT>/<FONT style="font-size: 60%">4</FONT>%&#148;.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(l)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The reference in the Note to &#147;49.8473 shares of Common Stock&#148; shall be changed
to &#147;60.6061 shares of Common Stock&#148;.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(m)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The reference in the Note to &#147;an Exchange Price of approximately $20.06 per
share&#148; shall be changed to &#147;an Exchange Price of approximately $16.50 per share&#148;.</TD>
</TR>

</TABLE>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SECTION 3. <U>Waiver of Defaults and Events of Default</U>. Any existing or past default,
Default or Event of Default arising under the Indenture as a result of a failure to comply with
Sections&nbsp;4.06, 4.08 and 5.04 of the Indenture (as each Section existed prior to its amendment
pursuant to this Supplemental Indenture) or any acceleration of any Indebtedness in connection
therewith is hereby waived.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SECTION 4. <U>Ratification of Indenture; Supplemental Indentures Part of Indenture</U>.
Except as expressly amended hereby, the Indenture is in all respects ratified and confirmed and all
the terms, conditions and provisions thereof shall remain in full force and effect. This
Supplemental Indenture shall form a part of the Indenture for all purposes, and every holder of
Notes heretofore or hereafter authenticated and delivered shall be bound hereby.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SECTION 5. <U>Governing Law</U>. THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SECTION 6. <U>Trustee Makes No Representation</U>. The Trustee makes no representation as
to the validity or sufficiency of this Supplemental Indenture.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SECTION 7. <U>Execution in Counterparts</U>. This Supplemental Indenture may be executed in
any number of counterparts, each of which shall be an original, but such counterparts shall
together constitute but one and the same instrument.
</DIV>

<P align="center" style="font-size: 10pt">7
</DIV>

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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SECTION 8. <U>Effect of Headings</U>. The titles and headings of the Sections of this
Supplemental Indenture have been inserted for convenience of reference only, and are not to be
considered a part hereof, and shall in no way modify or restrict any of the terms or provisions
hereof.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SECTION 9. <U>Effectiveness</U>. This Supplemental Indenture shall become effective upon
execution by the Company, the Issuer, the Subsidiary Guarantor, and the Trustee.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;SECTION 10. <U>Reaffirmation of the Indemnification Obligations under Section&nbsp;7.06</U>. In
connection with the execution of this Supplemental Indenture, the Company, the Issuer and the
Subsidiary Guarantors hereby reaffirm their respective indemnification obligations in favor of the
Trustee under Section&nbsp;7.06 of the Indenture.
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt">&#091;signature page follows&#093;
</DIV>


<P align="center" style="font-size: 10pt">8
</DIV>

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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">




<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;IN WITNESS WHEREOF, each of the parties hereto have caused this Supplemental Indenture to be
duly executed on its behalf by its duly authorized officer as of the day and year first above
written.
</DIV>
<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="45%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="40%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="5" valign="top" align="left">CSK AUTO, INC.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD colspan="3" align="left" valign="top">By: /s/ Randi Val Morrison
<DIV style="margin-left: 19px; font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Name:
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Randi Val Morrison</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Title:
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Vice President, General Counsel and Secretary</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="5" valign="top" align="left">CSK AUTO CORPORATION</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD colspan="3" align="left" valign="top">By: /s/ Randi Val Morrison
<DIV style="margin-left: 19px; font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
</TD>

    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR style="font-size: 1px">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top" style="border-top: 0px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Name:
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Randi Val Morrison</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Title:
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Vice President, General Counsel and Secretary</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="5" valign="top" align="left">CSKAUTO.COM, INC.</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD colspan="3" align="left" valign="top">By: /s/ Randi Val Morrison
<DIV style="margin-left: 19px; font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR style="font-size: 1px">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top" style="border-top: 0px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Name:
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Randi Val Morrison</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Title:
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Vice President, General Counsel and Secretary</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="5" valign="top" align="left">THE BANK OF NEW YORK TRUST<br>COMPANY, N.A., as Trustee</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>

<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD colspan="3" align="left" valign="top">By: /s/ Sandee&#146; Parks
<DIV style="margin-left: 19px; font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>








<TR style="font-size: 1px">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="3" align="left" valign="top" style="border-top: 0px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Name:
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Sandee&#146; Parks</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Title:
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Vice President</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<P align="center" style="font-size: 10pt">9
</DIV>

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</HTML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>3
<FILENAME>p72673exv99w1.htm
<DESCRIPTION>EXHIBIT 99.1
<TEXT>
<HTML>
<HEAD>
<TITLE>exv99w1</TITLE>
</HEAD>
<BODY bgcolor="#FFFFFF">
<!-- PAGEBREAK -->
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>
<DIV style="font-family: 'Times New Roman',Times,serif">




<DIV align="right" style="font-size: 10pt; margin-top: 12pt">Exhibit&nbsp;99.1
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt"><B>CSK AUTO OBTAINS WAIVER OF DEFAULT WITH RESPECT TO 4<FONT style="font-size: 70%"><SUP>5</SUP></FONT>/<FONT style="font-size: 60%">8</FONT>% SENIOR EXCHANGEABLE NOTES AND ENTERS INTO
AGREEMENT TO AMEND CERTAIN TERMS OF THE NOTES AND THE RELATED INDENTURE</B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">PHOENIX, AZ, July&nbsp;27, 2006&#151;CSK Auto Corporation (NYSE: CAO) (the &#147;Company&#148;) announced today that
its wholly owned subsidiary, CSK Auto, Inc. (&#147;Auto&#148;), has reached an agreement (the &#147;Letter
Agreement&#148;) with a majority in aggregate principal amount of its 4<FONT style="font-size: 70%"><SUP>5</SUP></FONT>/<FONT style="font-size: 60%">8</FONT>% Senior Exchangeable Notes due
2025 (the &#147;Notes&#148;) to (i)&nbsp;provide for the waiver of any default or event of default resulting from
Auto&#146;s failure to file certain financial information with the Trustee for the Notes (such
requirement, the &#147;Filing Covenant&#148;), including the default that was the subject of the previously
announced notice of default delivered to Auto (the &#147;Waiver&#148;) and (ii)&nbsp;amend the Indenture governing
the Notes (the &#147;Indenture&#148;) to exempt Auto from compliance with the Filing Covenant until June&nbsp;30,
2007 (the &#147;Extension&#148;).
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">In consideration for the Waiver and the Extension, the Indenture and the Notes will be further
amended to increase the interest rate of the Notes to 6<FONT style="font-size: 70%"><SUP>3</SUP></FONT>/<FONT style="font-size: 60%">4</FONT>% per year and to increase the exchange
rate of the Notes from 49.8473 shares of the Company&#146;s common stock per $1,000 principal amount of
Notes to 60.6061 shares of the Company&#146;s common stock per $1,000 principal amount of Notes (the
&#147;Amendments&#148;).
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">The Waiver, Extension and Amendments will be applicable to all outstanding Notes.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">The Letter Agreement will expire on August&nbsp;4, 2006 if a Supplemental Indenture that will give
effect to the Extension and the Amendments is not executed and delivered by Auto and the Trustee
for the Notes by 5:00, Eastern Daylight Time, on August&nbsp;4, 2006. The Company expects that the
Supplemental Indenture will be executed on or before July&nbsp;28, 2006.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">CSK Auto Corporation is the parent company of CSK Auto, Inc., a specialty retailer in the
automotive aftermarket. As of April&nbsp;30, 2006, the Company operated 1,288 stores in 22 states under
the brand names Checker Auto Parts, Schuck&#146;s Auto Supply, Kragen Auto Parts and Murray&#146;s Discount
Auto Stores.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">CONTACT: CSK Auto Corporation<BR>
Brenda Bonn, 602-631-7483 (Investor Contact)<BR>
or<BR>
Ashton Partners<BR>
Mike Banas, 312-553-6704 (Media Contact)

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