UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No.    )

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Dorman Products, Inc.
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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 10, 2018. DORMAN PRODUCTS, INC. DORMAN PRODUCTS, INC. ATTN: THOMAS J. KNOBLAUCH 3400 EAST WALNUT STREET COLMAR, PA 18915 Meeting Information Meeting Type: Annual Meeting For holders as of: March 9, 2018 Date: May 10, 2018 Time: 8:30 a.m. Location: 3400 East Walnut Street Colmar, PA 18915 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 that are available to you on the Internet. You may view the proxy materials online at www.proxyvote.com 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. proxy See the materials reverse and side voting of this instructions. notice to obtain E41657-P00840

Before You Vote How to Access the Proxy Materials Proxy Materials Available to VIEW or RECEIVE: NOTICE AND PROXY STATEMENT ANNUAL REPORT How to View Online: Have the information that is printed in the box marked by the arrow XXXX XXXX XXXX XXXX (located on the following page) and visit: www.proxyvote.com. 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 or future documents, you must make a request. There is NO charge to receive a copy. Please choose one of the following methods to make your request to receive the current proxy materials or to select a future delivery preference: 1) BY INTERNET: www.proxyvote.com 2) BY TELEPHONE: 1-800-579-1639 3) BY E-MAIL*: sendmaterial@proxyvote.com * 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 XXXX XXXX XXXX XXXX (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 26, 2018 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 9, 2018, 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 www.proxyvote.com. Have the information that is printed in the box marked by the arrow XXXX XXXX XXXX XXXX (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. E41658-P00840

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 all of the nominees listed below: 1. Election of Directors Nominees: 1a. Steven L. Berman 1b. Mathias J. Barton 1c. John J. Gavin 1d. Paul R. Lederer 1e. Richard T. Riley 1f. Kelly A. Romano 1g. G. Michael Stakias The Board of Directors recommends you vote FOR proposals 2, 3 and 4. 2. Advisory approval of the compensation of our named executive of?cers. 3. Approval of the Dorman Products, Inc. 2018 Stock Option and Stock Incentive Plan. 4. Rati?cation of KPMG LLP as the Company’s independent registered public accounting ?rm for the 2018 ?scal year. NOTE: Such other business as may properly come before the meeting or any postponement or adjournment thereof. If the Annual Meeting of Shareholders is adjourned because of the absence of a quorum, those shareholders entitled to vote who attend the adjourned Annual Meeting, although constituting less than a quorum, shall nevertheless constitute a quorum for the purpose of electing directors. If the Annual Meeting of Shareholders is adjourned for one or more periods aggregating at least ?fteen (15) days because of the absence of a quorum, those shareholders entitled to vote who attend the reconvened annual meeting, if less than a quorum as determined under applicable law, shall nevertheless constitute a quorum for the purpose of acting upon any matter set forth herein. E41659-P00840

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