UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                    FORM 8-K
                                 CURRENT REPORT


                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934


          Date of report (Date of earliest event reported): May 2, 2005


                            O'REILLY AUTOMOTIVE, INC.
             (Exact Name of Registrant as Specified in Its Charter)


         Missouri                                      44-0618012
--------------------------------------------------------------------------------
(State or Other Jurisdiction                  (IRS Employer Identification No.)
     of Incorporation) 

                                233 S. Patterson
                           Springfield, Missouri 65802
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               (Address of Principal Executive Offices)(Zip Code)


                                  417-862-6708
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              (Registrant's Telephone Number, Including Area Code)


                                (Not Applicable)
--------------------------------------------------------------------------------
         (Former name or former address, if changed since last report.)


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 (see General Instruction A.2):

[_]  Written  communications  pursuant to Rule 425 under the  Securities Act (17
     CFR 230.425)

[_]  Soliciting  material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
     240.14a-12)

[_]  Pre-commencement   communications  pursuant  to  Rule  14d-2(b)  under  the
     Exchange Act (17 CFR 240.14d-d(b))

[_]  Pre-commencement   communications  pursuant  to  Rule  13e-4(c)  under  the
     Exchange Act (17 CFR 240-13e-4(c))

Item 1.01 - Entry Into a Material Definitive Agreement

On May 2, 2005,  O'Reilly  Automotive,  Inc. (the  "Registrant")  entered into a
definitive  agreement with Midwest Auto Parts Distributors  ("Midwest") pursuant
to which the  Registrant  has agreed to acquire all of the  outstanding  capital
stock of Midwest for $61 million in cash.  The  transaction is expected to close
on May 31, 2005, and is subject to customary  closing  conditions.  There are no
material  relationships  between the  Registrant or its  affiliates  and Midwest
other than the definitive agreement.

Item 9.01 - Financial Statements and Exhibitis

On  May  2,  2005,  the  Registrant  issued  a  press  release   announcing  the
transaction. The press release is attached hereto as Exhibiti 99.1.


Exhibit 
Number         Description
------         -----------------------------------------------------------------

 99.1          Press Release dated May 2, 2005

The  information  in this  Current  Report on Form 8-K,  including  the  exhibit
hereto,  shall not be deemed  "filed"  for the  purposes  of  Section  18 of the
Securities  Exchange  Act of 1934,  as  amended,  or  otherwise  subject  to the
liabilities of that section, nor shall it be deemed incorporated by reference in
any filing under the Securities Act of 1933, as amended.

                                    SIGNATURE

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.

Date:  May 4, 2005
                                     O'REILLY AUTOMOTIVE, INC.

                                     By:/s/ James R. Batten               
                                     -------------------------------------------
                                     James R. Batten
                                     Executive Vice President of Finance
                                      Chief Financial Officer and Treasurer
                                      (principal financial officer)



EXHIBIT 99.1                                  

FOR IMMEDIATE RELEASE

For further information contact:                              Greg Henslee
                                                              James R. Batten
                                                              (417) 862-3333
________________________________________________________________________________

                    O'REILLY AUTOMOTIVE ANNOUNCES PURCHASE OF
                         MIDWEST AUTO PARTS DISTRIBUTORS
________________________________________________________________________________

Springfield,  MO, May 2, 2005 -- O'Reilly Automotive, Inc. ("O'Reilly") (Nasdaq:
ORLY)  today  announced  that it has  entered  into a  definitive  agreement  to
purchase all of the  outstanding  stock of W.E. Lahr Company and it's subsidiary
Midwest Auto Parts Distributors, Inc. & affiliates ("Midwest"), headquartered in
St. Paul, Minnesota.

Under the terms of the agreement,  O'Reilly will purchase all of the outstanding
stock of  Midwest  for $61  million  in cash.  The  transaction  is  subject  to
customary closing conditions. The transaction is expected to close May 31, 2005.

Midwest operates 71 stores in Minnesota,  Montana,  South Dakota,  Wisconsin and
Wyoming that receive  nightly  delivery from one of their  distribution  centers
located in St. Paul,  Minnesota and Billings,  Montana.  Midwest  recorded $98.7
million in sales for the fiscal  year  ending  September  30,  2004.  W.E.  Lahr
Company  has been in  business  for 70 years as a major  warehouse  distributor,
local  jobber  and  retailer  of  automotive   aftermarket   parts.   With  this
acquisition,  Midwest's  current  operations  will be a compliment to O'Reilly's
already  successful  dual  market  strategy  and expand  O'Reilly's  presence to
twenty-four contiguous states.

Greg Henslee, Chief Executive Officer of O'Reilly,  stated, "We are very excited
about the growth opportunities and the great new markets that the acquisition of
Midwest  will  bring.  We view  Midwest  as a good fit both  geographically  and
operationally."

Ted Wise,  Chief Operating  Officer  stated,  "Not only will we be adding 71 new
stores in 5 new states,  but we will also be  welcoming  nearly 700 Midwest team
members to Team O'Reilly,  where their knowledge and customer relationships will
be a key to our success in those  markets.  In addition we are excited about the
opportunity  to  continue  serving  the  needs  of the  108  independent  jobber
customers currently served by Midwest".

Jim Bartholomew,  CEO of Midwest stated, "We believe the synergistic benefits of
this  combination will greatly enhance our program offering to our customers and
provide expanded growth  opportunities for our employees.  Midwest's owner, Bill
Lahr,  passed away last fall. Bill had great respect for the O'Reilly family and
their business model, and had Midwest adopt many of their strategies."

O'Reilly will add  approximately  160 new stores for 2005, in addition to the 71
new  stores  from  the  Midwest   acquisition.   The  company  anticipates  this
transaction to be accretive to earnings for 2005. Further guidance will be given
following the closing of the transaction.

O'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'Reilly  family,  the Company  operated  1,286
stores  within the states of  Alabama,  Arkansas,  Florida,  Georgia,  Illinois,
Indiana, Iowa, Kansas, Kentucky,  Louisiana,  Mississippi,  Missouri,  Nebraska,
North Carolina,  Oklahoma, South Carolina,  Tennessee,  Texas and Virginia as of
March 31, 2005.

The  Company  claims  the  protection  of the  safe-harbor  for  forward-looking
statements within the meaning of the Private Securities Litigation Reform Act of
1995.  These  statements  can be  identified  by  forward-looking  words such as
"expect,"  "believe,"   "anticipate,"   "good,"  "plan,"  "intend,"  "estimate,"
"project,"  "will" or similar words. In addition,  statements  contained  within
this press release that are not historical facts are forward-looking statements,
such as  statements  discussing  among  other  things,  expected  growth,  store
development and expansion  strategy,  business  strategies,  future revenues and
future  performance.  These  forward-looking  statements are based on estimates,
projections, beliefs and assumptions and are not guarantees of future events and
results.  Such statements are subject to risks,  uncertainties  and assumptions,
including, but not limited to, competition,  product demand, the market for auto
parts,  the economy in general,  inflation,  consumer debt levels,  governmental
approvals, our ability to hire and retain qualified employees,  risks associated
with the integration of acquired businesses,  weather, terrorist activities, war
and the threat of war.  Actual  results may materially  differ from  anticipated
results described or implied in these forward-looking  statements.  Please refer
to the Risk  Factors  sections  of the  Company's  Form 10-K for the year  ended
December 31, 2004, for more details.