Definitive Additional Materials





Washington, D.C. 20549


Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No.    )

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¨   Preliminary Proxy Statement
¨   Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
¨   Definitive Proxy Statement
x   Definitive Additional Materials
¨   Soliciting Material Pursuant to Rule14a-12
Dorman Products, Inc.
(Name of the Registrant as Specified In Its Charter)
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*** Exercise Your Right to Vote ***

Important Notice Regarding the Availability of Proxy Materials for the

Shareholder Meeting to Be Held on May 14, 2013.








PO. BOX 1342


   Meeting Information
   Meeting Type:            Annual Meeting
   For holders as of:       March 22, 2013
   Date: May 14, 2013     Time: 8:30 a.m.
   Location:    Blank Rome LLP
                         One Logan Square
                         130 N. 18th St.
                         Philadelphia, PA 19103

You are receiving this communication because you hold

shares in the company named above.


   This is not a ballot. You cannot use this notice to vote these shares. This communication presents only an overview of the more complete proxy materials which contain important information and are available to you on the Internet or by mail. You may view the proxy materials online at www. or easily request a paper copy (see reverse side).

We encourage you to access and review all of the important information contained in the proxy materials before voting.



See the reverse side of this notice to obtain proxy materials and voting instructions.



— Before You Vote —

How to Access the Proxy Materials



Proxy Materials Available to VIEW or RECEIVE:




How to View Online:

Have the information that is printed in the box marked by the arrowg LOGO (located on the following page) and visit:

How to Request and Receive a PAPER or E-MAIL Copy:

If you want to receive a paper or e-mail copy of these documents, you must request one. There is NO charge for

requesting a copy. Please choose one of the following methods to make your request:


2) BY TELEPHONE:   1-800-579-1639
3) BY E-MAIL*:

* If requesting materials by e-mail, please send a blank e-mail with the information that is printed in the box marked by the arrow g LOGO (located on the following page) in the subject line.

Requests, instructions and other inquiries sent to this e-mail address will NOT be forwarded to your investment advisor. Please make the request as instructed above on or before April 30, 2013 to facilitate timely delivery.

— How To Vote —

Please Choose One of the Following Voting Methods


Vote In Person: If you are a shareholder of record as of the close of business on March 22, 2013, you may vote in person at the shareholder meeting. Many shareholder meetings have attendance requirements including, but not limited to, the possession of an attendance ticket issued by the entity holding the meeting. Please check the meeting materials for any special requirements for meeting attendance. At the meeting, you will need to request a ballot to vote these shares.

Vote By Internet: To vote now by Internet, go to Have the information that is printed in the box marked by the arrowg LOGO (located on the following page) available and follow the instructions.

Vote By Mail: You can vote by mail by requesting a paper copy of the materials, which will include a proxy card.

*To vote by proxy, cumulative voting for directors can only be processed by using the proxy card method of voting.

Voting Items

The Annual Meeting of Shareholders of Dorman Products, Inc. has been called to consider and act upon the following matters:

The Board of Directors recommends you vote FOR the following five Directors:

1. Election of Directors


01) Steven L. Berman

02) Paul R. Lederer

03) Edgar W. Levin

04) Robert M. Lynch

05) Richard T. Riley

The Board of Directors recommends you vote FOR the following proposal:


2. Ratification of KPMG LLP as the Company’s independent registered public accounting firm for the 2013 fiscal year.

NOTE: Such other business as may properly come before the meeting or any postponement or adjournment thereof.