<SUBMISSION>
<ACCESSION-NUMBER>0001299933-08-001723
<TYPE>8-K
<PUBLIC-DOCUMENT-COUNT>3
<PERIOD>20080401
<ITEMS>8.01
<ITEMS>9.01
<FILING-DATE>20080401
<DATE-OF-FILING-DATE-CHANGE>20080401
<FILER>
<COMPANY-DATA>
<CONFORMED-NAME>CSK AUTO CORP
<CIK>0001051848
<ASSIGNED-SIC>5531
<IRS-NUMBER>860765798
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>0204
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>8-K
<ACT>34
<FILE-NUMBER>001-13927
<FILM-NUMBER>08730409
</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>htm_26440.htm
<DESCRIPTION>LIVE FILING
<TEXT>
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<TITLE> CSK Auto Corporation (Form: 8-K) </TITLE>
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		UNITED STATES<BR>
	SECURITIES AND EXCHANGE COMMISSION
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<BR>
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	WASHINGTON, D.C. 20549
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	FORM 8-K
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	CURRENT REPORT
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	Pursuant to Section&nbsp;13 or 15(d) of the Securities Exchange Act of 1934
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	Date of Report (Date of Earliest Event Reported):
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	&nbsp;
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	April 1, 2008
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	CSK Auto Corporation
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<BR>__________________________________________<BR>
	(Exact name of registrant as specified in its charter)
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	&nbsp;
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	Delaware
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	001-13927
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	86-0765798
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_____________________<BR>
	(State or other jurisdiction
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_____________<BR>
	(Commission
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______________<BR>
	(I.R.S. Employer
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	of incorporation)
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	File Number)
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	Identification No.)
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	645 E. Missouri Ave., Suite 400, Phoenix, Arizona
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	&nbsp;
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	85012
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_________________________________<BR>
	(Address of principal executive offices)
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	&nbsp;
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___________<BR>
	(Zip Code)
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	Registrant&#146;s telephone number, including area code:
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	602-265-9200
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<FONT SIZE="2">
	Not Applicable
<BR>______________________________________________<BR>
	Former name or former address, if changed since last report
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	&nbsp;
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<!-- CoverPageRegistrant END --><P><FONT SIZE="2">
Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any
of the following provisions:</FONT>
</P>
<P><FONT SIZE="2">
[x]&nbsp;&nbsp;Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)<br>
[&nbsp;&nbsp;]&nbsp;&nbsp;Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)<br>
[&nbsp;&nbsp;]&nbsp;&nbsp;Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))<br>
[&nbsp;&nbsp;]&nbsp;&nbsp;Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))<br>
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<B>
	Item 8.01 Other Events.
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<FONT SIZE="2">
     On April 1, 2008, CSK Auto Corporation (the "Company") and O'Reilly Automotive, Inc. ("O'Reilly") issued a joint press release announcing that the Company and O'Reilly have entered into a definitive merger agreement under which O&#x2019;Reilly has agreed to make an exchange offer to acquire all of the outstanding shares of the Company&#x2019;s common stock (the "Transaction").  The full text of the press release is filed as Exhibit 99.1 to this current report on Form 8-K and is incorporated herein by reference.<br><br>     On April 1, 2008, the Company distributed a memorandum to its employees with respect to the Transaction.  The full text of the memorandum is filed as Exhibit 99.2 to this current report on Form 8-K and is incorporated herein by reference.
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	Item 9.01 Financial Statements and Exhibits.
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(d) The following exhibits are filed with this Form 8-K:<br><br>Exhibit		Description								<br>99.1		Joint Press Release dated April 1, 2008.<br>99.2		Employee Communication dated April 1, 2008.
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	SIGNATURES
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	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.
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	CSK Auto Corporation
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	&nbsp;&nbsp;
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<I>
	April 1, 2008
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<I>
	By:
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	&nbsp;
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<I>
	Randi Val Morrison
</I>
<BR>
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	&nbsp;
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<I>
	Name: Randi Val Morrison
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<I>
	Title: Senior Vice President, General Counsel and Secretary
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	Exhibit&nbsp;Index
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	Exhibit No.
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	Description
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	99.1
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<FONT SIZE="2">
	&nbsp;
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<TD ALIGN="LEFT" VALIGN="TOP" WIDTH="77%">
<FONT SIZE="2">
Joint Press Release dated April 1, 2008.
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	99.2
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<FONT SIZE="2">
	&nbsp;
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Employee Communication dated April 1, 2008.
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<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>exhibit1.htm
<DESCRIPTION>EX-99.1
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<TITLE> EX-99.1 </TITLE>
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<BODY style="font-family: 'Times New Roman',Times,serif">


<P align="center" style="font-size: 10pt"><FONT style="font-size: 11pt"><B>O&#146;REILLY TO ACQUIRE CSK AUTO FOR $1.0 BILLION</B></FONT>



<P align="center" style="font-size: 11pt"><I>-CSK shareholders to receive $12.00 in value per share including<BR>
$11.00 of O&#146;Reilly common stock plus $1.00 in cash per CSK share</I>



<P align="center" style="font-size: 11pt"><I>-Combined company will be third largest national auto parts retailer</I>



<P align="center" style="font-size: 11pt"><I>-Compelling strategic fit with highly complementary geographic presence</I>



<P align="left" style="font-size: 11pt"><B>Springfield, MO and Phoenix, AZ </B>- <B>April&nbsp;1, 2008 </B>&#151; O&#146;Reilly Automotive, Inc. (&#147;O&#146;Reilly&#148;) (Nasdaq:
ORLY) and CSK Auto Corporation (NYSE:CAO) (&#147;CSK&#148;) today announced that the two companies have
signed a definitive merger agreement under which O&#146;Reilly will acquire all of the outstanding
shares of CSK common stock pursuant to an exchange offer, in a transaction valued at approximately
$1.0&nbsp;billion, including approximately $500&nbsp;million of debt. The boards of directors of both
companies have approved the transaction.


<P align="left" style="font-size: 11pt">Under the terms of the agreement, CSK shareholders will receive $11.00 of O&#146;Reilly common stock,
subject to a collar, plus $1.00 in cash for each share of CSK common stock.


<P align="left" style="font-size: 11pt">The amount of consideration to be received per share of CSK common stock will equal a number of
shares of O&#146;Reilly common stock based on an exchange ratio equal to $11.00 divided by the average
trading price of O&#146;Reilly common stock for the five trading days ending two trading days prior to
the consummation of the exchange offer plus $1.00 in cash (subject to reduction); provided,
however, that if the average trading price of O&#146;Reilly stock is greater than $29.95, then the
exchange ratio shall equal 0.3673, and if the average trading price is less than $25.67, then the
exchange ratio shall equal 0.4285.


<P align="left" style="font-size: 11pt">&#147;Today is an exciting day for both O&#146;Reilly and CSK shareholders,&#148; stated O&#146;Reilly Automotive Chief
Executive Officer Greg Henslee. &#147;As a combined company, we will be even stronger and more
competitive, with the ability to better meet the continuing evolution of the automotive aftermarket
industry. Additionally, we are creating a company that will generate significant value for the
combined companies&#146; shareholders, growth opportunities for team members and enhanced service to our
customers.&#148;


<P align="left" style="font-size: 11pt">&#147;The benefits of this transaction are very compelling,&#148; said Larry Mondry, CSK Auto&#146;s President and
Chief Executive Officer. &#147;After careful consideration of a number of viable alternatives, our Board
has determined that partnering with O&#146;Reilly is clearly the best course of action for our
shareholders. As part of a stronger, more financially flexible company, shareholders, creditors
and suppliers will have a meaningful opportunity to participate in the development of a company
that will be well positioned to be a nation-wide leader in the automotive aftermarket industry.
Equally important, this transaction provides growth and advancement opportunities for CSK&#146;s team
members.&#148;


<P align="left" style="font-size: 11pt">The transaction will create a combined entity that expects to realize several significant strategic
benefits, including:


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 11pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&#149;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD><B>Leading auto-parts retailer</B></TD>
</TR>

</TABLE>



<P align="left" style="margin-left:2%; font-size: 11pt">Following the close of the transaction, O&#146;Reilly will be the third largest national auto parts
retailer with approximately 3,200 stores located across the United States. The combined company
had pro forma revenues of approximately $4.4&nbsp;billion in 2007.


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">



&#149;




</TABLE>

<P align="center" style="font-size: 10pt; display: none">1
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</TABLE>



<P align="left" style="margin-left:2%; font-size: 11pt"><B>Strengthened and diversified position, creating a national platform</B>
<BR>
O&#146;Reilly and CSK maintain highly complementary business models in two distinctive regions of the
country. Building upon the foundation of CSK&#146;s strong Western presence and O&#146;Reilly&#146;s Midwestern
and Southeastern presence, the combined company will be well positioned to further leverage
O&#146;Reilly&#146;s very effective dual-market strategy. Additionally, acquiring CSK will give O&#146;Reilly a
national platform and will allow further expansion into other geographical regions throughout
the country.


<P>
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 11pt; color: #000000; background: transparent">
    <TD width="1%" nowrap align="right">&#149;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD><B>Opportunity to enhance existing CSK operations</B></TD>
</TR>

</TABLE>



<P align="left" style="margin-left:2%; font-size: 11pt">O&#146;Reilly expects to strengthen CSK&#146;s existing operations by executing its proven dual market
strategy of providing exceptional service to both DIY customers and professional installers.
The implementation of O&#146;Reilly&#146;s industry-leading distribution and inventory management systems
will further improve the combined company&#146;s competitiveness in CSK&#146;s markets.


<P align="left" style="font-size: 11pt"><B>Financial Considerations</B>


<P align="left" style="font-size: 11pt">O&#146;Reilly anticipates that the transaction will be modestly accretive to O&#146;Reilly&#146;s earnings per
share in fiscal year 2009. Cost savings are expected to be approximately $100&nbsp;million annually
beginning in fiscal year 2010, resulting in more significant earnings per share accretion.
O&#146;Reilly expects synergies to come primarily from leveraging the combined company&#146;s buying power to
lower product acquisition cost and streamlining CSK&#146;s SG&#038;A expense structure by implementing
O&#146;Reilly&#146;s dual market strategy.


<P align="left" style="font-size: 11pt"><B>Timing, Approvals and Financing</B>


<P align="left" style="font-size: 11pt">The transaction is subject to the successful conclusion of the exchange offer as well as customary
closing conditions and antitrust approvals, including expiration of the applicable waiting period
under the Hart-Scott-Rodino Antitrust Improvements Act of 1976. Based on the closing stock prices
on Monday, March&nbsp;31, 2008, O&#146;Reilly expects to issue approximately 16&nbsp;million shares of O&#146;Reilly
common stock to be issued to CSK shareholders.


<P align="left" style="font-size: 11pt">O&#146;Reilly has entered into a commitment for a $1.2&nbsp;billion asset based revolving credit facility
with Bank of America and Lehman Brothers Inc. which will be used to refinance debt, fund the cash
portion of the consideration and other transaction-related expenses and to provide ample liquidity
for the combined company going forward.


<P align="left" style="font-size: 11pt">Lehman Brothers Inc. is serving as exclusive financial advisor and Skadden, Arps, Slate, Meagher &#038;
Flom LLP is serving as legal adviser to O&#146;Reilly. JP Morgan Securities Inc. is acting as financial
advisor and Gibson, Dunn &#038; Crutcher LLP is acting as legal advisor to CSK.


<P align="left" style="font-size: 11pt"><B>Investor/Analyst Conference Call</B>


<P align="left" style="font-size: 11pt">O&#146;Reilly will provide further details regarding this announcement on a conference call with
analysts and investors scheduled for Tuesday, April 1 at 10:00 am Eastern time. Those who wish to
participate should call 800-865-4445 for domestic callers or 973-935-2840 for international
callers. When prompted, provide the passcode, which is 41919438. The conference call will also be
webcast on the Investor Relations section of O&#146;Reilly website at <U>www.oreillyauto.com</U>.


<P align="left" style="font-size: 11pt">For interested individuals unable to join the live call, a replay of the webcast will be available
on O&#146;Reilly&#146;s website.


<P align="left" style="font-size: 11pt"><B>About O&#146;Reilly Automotive, Inc</B>
<BR>
O&#146;Reilly Automotive, Inc. is one of the largest specialty retailers of automotive aftermarket
parts, tools, supplies, equipment and accessories in the United States, serving both the
do-it-yourself and professional installer markets. Founded in 1957 by the O&#146;Reilly family, the
Company operated 1,830 stores in the states of Alabama, Arkansas, Florida, Georgia, Illinois,
Indiana, Iowa, Kansas, Kentucky, Louisiana, Minnesota, Mississippi, Missouri, Montana, Nebraska,
North Carolina, North Dakota, Ohio, Oklahoma, South Carolina, South Dakota, Tennessee, Texas,
Virginia, Wisconsin and Wyoming as of December&nbsp;31, 2007.


<P align="left" style="font-size: 11pt"><B>About CSK Auto</B>
<BR>
CSK Auto Corporation is the parent company of CSK Auto, Inc., a specialty retailer in the
automotive aftermarket. As of January&nbsp;6, 2008, the Company operated 1,349 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.


<P align="left" style="font-size: 11pt"><B>Additional Information</B>
<BR>
In connection with the exchange offer, O&#146;Reilly intends to file a registration statement on Form
S-4 and a Schedule&nbsp;TO with the Securities Exchange Commission (&#147;SEC&#148;) and CSK intends to file a
solicitation/recommendation statement on Schedule&nbsp;14D-9. Such documents, however, are not
currently available. These documents contain important information about the transaction and should
be read before any decision is made with respect to the exchange offer. Investors will be able to
obtain free copies of the registration statement, Schedule&nbsp;TO, Schedule&nbsp;14D-9 as well as other
filings containing information about O&#146;Reilly and CSK without charge, at the SEC&#146;s website
(http://www.sec.gov) once such documents are filed with the SEC. A free copy of the exchange offer
materials, when they become available, may also be obtained from O&#146;Reilly or CSK.


<P align="left" style="font-size: 11pt"><B>O&#146;Reilly Contacts</B>
<BR>
Joele Frank, Wilkinson Brimmer Katcher
<BR>
Ed Trissel, 212-355-4449


<P align="left" style="font-size: 11pt"><B>CSK Contacts</B>
<BR>
Investors:
<BR>
CSK Auto Corporation, Phoenix
<BR>
Brenda Bonn, 602-631-7483
<BR>
Manager, Investor Relations


<P align="left" style="font-size: 11pt">Media:
<BR>
Sard Verbinnen &#038; Co.
<BR>
Paul Kranhold, 415-618-8750 or
<BR>
Drew Brown, 212-687-8080



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<P align="left" style="font-size: 10pt"><FONT style="font-size: 12pt">April&nbsp;1, 2008
</FONT>

<P align="left" style="font-size: 12pt">To all associates &#151;


<P align="left" style="font-size: 12pt">I am writing to share some important news about our company. This morning we announced that we
have entered into a definitive agreement with O&#146;Reilly Automotive, Inc. (Nasdaq: ORLY) under which
O&#146;Reilly will acquire CSK Auto Corporation in a part stock, part cash transaction.


<P align="left" style="font-size: 12pt">As you know, over the last several months our Board of Directors has been evaluating strategic
opportunities to determine the best course of action for CSK Auto. We realize that this time period
has been filled with considerable anxiety in view of the uncertainties associated with the outcome,
and the Board and I would like to thank all of you for your patience and support during this time
period.


<P align="left" style="font-size: 12pt">I can assure you that this has been a rigorous process that included the evaluation of a broad
range of opportunities. We considered the potential for continuing as a standalone company,
divesting assets and recapitalizing the business, and held discussions with a number of strategic
and financial parties concerning various potential business combinations and transactions. After
careful consideration, it is clear to our Board &#150; and our management team &#150; that joining with
O&#146;Reilly under the terms that we have agreed upon is the best course of action for all of our
stakeholders.


<P align="left" style="font-size: 12pt">The combination of CSK and O&#146;Reilly will create a company well positioned to be a nationwide leader
in the automotive aftermarket industry. CSK&#146;s leading market position and strong brand name
recognition in the Western United States, together with O&#146;Reilly&#146;s significant presence in most
other regions of the United States, will give the combined company a national presence, with little
market overlap. In addition, O&#146;Reilly, with its strong commercial sales program, has great
potential to successfully grow the commercial sales business in our stores. The transaction also
provides the owners of our company, our shareholders, significant immediate value &#151; a meaningful
opportunity to participate in a well regarded company with a strong balance sheet that is a leading
player in our industry.


<P align="left" style="font-size: 12pt">It is important to realize that today&#146;s announcement is the first step in consummating a
combination with O&#146;Reilly. Nothing will change overnight. Before our companies can combine,
certain conditions, such as regulatory filings and approvals, must be made and obtained. Assuming
all goes as planned, we expect to receive the necessary approvals and to close the transaction
within the next few months. Until that time, we will continue to operate as an independent
company, and I encourage you to stay focused on strengthening our brands and our business for the
benefit of our stakeholders.


<P align="left" style="font-size: 12pt">I realize that you have many questions, and we will be diligent in addressing those questions in
the weeks ahead. You will be hearing more from me and our transition teams as we work with
O&#146;Reilly to develop a comprehensive integration plan to ensure a seamless transition as we combine
the two companies. I&#146;ve attached a press release that contains more information about the
transaction. I encourage you to please read the release and to contact your supervisor or me with
any additional questions.


<P align="left" style="font-size: 12pt">Our vendors and customers will also have questions and we will help to prepare you to address those
questions. Together CSK and O&#146;Reilly will be a stronger company with an ability to drive growth in
our markets, which will ultimately be better for our customers and you, our employees. The most
important thing to communicate is that we will continue to deliver the same high quality service
that our vendors and customers have come to expect from us.


<P align="left" style="font-size: 12pt">As always, should you be contacted by the media, please direct them to our investor relations firm,
Sard Verbinnen &#151; Paul Kranhold at 415 618 8750 or Drew Brown at 212 687-8080. Investor inquiries
should be directed to Brenda Bonn. I&#146;d like to thank you again for your dedication and hard work as
an employee of CSK.


<P align="left" style="font-size: 12pt">Regards,


<P align="left" style="font-size: 12pt">Larry



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