X0306 4 2018-08-15 0 0000868780 Dorman Products, Inc. DORM 0001135359 LEDERER PAUL R C/O DORMAN PRODUCTS, INC. 3400 WALNUT STREET COLMAR PA 18915 1 0 0 0 Common Stock 2018-08-15 4 S 0 2325 76.48 D 23058 I By trusts Common Stock 2018-08-15 4 S 0 1600 76.77 D 16679 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $76.28 to $76.64. The reporting person undertakes to provide to Dorman Products, Inc., any security holder of Dorman Products, Inc. or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. These shares are held in trusts for the benefit of the reporting person's children. The reporting person's spouse is trustee of the trusts. The reporting person disclaims beneficial ownership of the shares held by such trusts, and this report should not be deemed an admission that the reporting person is the beneficial owner of the trusts' shares for purposes of Section 16 or for any other purpose. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $76.6534 to $76.85. The reporting person undertakes to provide to Dorman Products, Inc., any security holder of Dorman Products, Inc. or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The filing of this Statement shall not be construed as an admission (a) that the person filing this Statement is, for the purposes of Section 16 of the Securities Exchange Act of 1934, as amended, the beneficial owner of any equity securities covered by this Statement, or (b) that this Statement is legally required to be filed by such person. /s/ Thomas J. Knoblauch, by Power of Attorney 2018-08-16