X0306 4 2017-02-27 0 0000868780 Dorman Products, Inc. DORM 0001544758 DARBY JEFFERY C/O DORMAN PRODUCTS, INC. 3400 EAST WALNUT STREET COLMAR PA 18915 0 1 0 0 SVP, Sales and Marketing Common Stock 2017-02-27 4 A 0 821 0.00 A 12305 D Common Stock 2017-02-27 4 F 0 253 78.64 D 12052 D Employee Stock Option (Right to Buy) 78.64 2017-02-27 4 A 0 3590 0.00 A 2022-02-27 Common Stock 3590 3590 D These shares were withheld by the issuer to satisfy Mr. Darby's tax withholding obligations. Such withholding is treated as a disposition of securities under Section 16 of the Securities Exchange Act of 1934, as amended. The option vests in four equal annual installments beginning on February 27, 2018, which is the first anniversary of the date of grant. 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 2017-03-01