Section 8 – Other Events

Item 8.01. Other Events.

On April 1, 2008, O’Reilly Automotive, Inc. (“O’Reilly”) and CSK Auto Corporation (“CSK”) issued a joint press release announcing that the two companies have signed a definitive merger agreement under which O’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 billion, including $500 million of debt. The boards of directors of both companies have approved the transaction.

Under the terms of the agreement, CSK shareholders will receive $11.00 of O’Reilly common stock, subject to a collar, plus $1.00 in cash for each share of CSK common stock.

The amount of consideration to be received per share of CSK common stock will equal a number of shares of O'Reilly common stock based on an exchange ratio equal to $11.00 divided by the average trading price of O'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 for costs associated with obtaining credit agreement waivers or amendments incurred by CSK over an agreed upon threshold); provided, however, that if the average trading price of O'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.

Upon termination of the merger agreement under certain circumstances, including if CSK sought to accept a superior proposal, CSK would be required to pay O'Reilly a termination fee of $22 million. The consummation of the exchange offer is subject to customary closing conditions.

A copy of the joint press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. As mentioned in the press release, an investor call to discuss the transaction was held by O'Reilly at 10:00 am Eastern time on April 1, 2008. A copy of the transcript of the investor call is attached hereto as Exhibit 99.2. While every effort has been made to provide an accurate transcription, there may be typographical mistakes, inaudible statements, errors, omissions or inaccuracies in the transcript, none of which O'Reilly deems to be material. The investor call was also webcast on the Investor Relations section of O’Reilly website at www.oreillyauto.com. A replay of the recorded investor call is also available on O'Reilly's website.

Safe Harbor for Forward-Looking Statements

Statements in this Current Report on Form 8-K, including the exhibits, may contain certain forward-looking statements relating to O'Reilly and its expectations for the proposed acquisition of CSK that are intended to be covered by the safe harbor for "forward-looking statements" provided by the Private Securities Litigation Reform Act of 1995. All such statements concerning activities, events or developments that O'Reilly expects, believes or anticipates will or may occur in the future are forward-looking statements. Forward-looking statements are based on current expectations, forecasts and projections about future events and involve known and unknown risks, uncertainties and other factors that may cause actual results and performance to be materially different from any future results or performance expressed or implied by forward-looking statements, including the following: the risk that the proposed transaction will not close because of a failure to satisfy one or more of the closing conditions; the risk that O'Reilly's business will have been adversely impacted during the pendency of the proposed transaction; the risk that the integration of operations may not be successful or may be materially delayed or may be more costly or difficult than expected; and the risk that the expected cost savings and other synergies from the transaction may not be fully realized, realized at all or take longer to realize than anticipated. Additional information on these and other risks, uncertainties and factors is included in O'Reilly's Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and other documents filed with the SEC. You should not place undue reliance on forward-looking statements, which speak only as of the date of this Current Report on Form 8-K. Except for any obligation to disclose material information under the Federal securities laws, O'Reilly undertakes no obligation to release publicly any revisions to any forward-looking statements to reflect events or circumstances after the date hereof.

Section 9 – Financial Statements and Exhibits

Item 9.01. Financial Statements and Exhibits.