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As a result, the amount\nof securities beneficially owned following the reported transactions reported in Column 5 was understated by 19 shares in the Original Form 4\nand in subsequent Forms 4 filed by the reporting person. This amendment is being filed to report correctly the number of shares withheld and the\ntotal number of shares beneficially owned following the transactions reported in the Original Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"The number of shares withheld by the issuer upon the vesting of a restricted stock award to satisfy the reporting person's tax withholding\nobligations was overstated in the reporting person's Form 4 filed on February 14, 2017 (\"Original Form 4\") by 19 shares. As a result, the amount\nof securities beneficially owned following the reported transactions reported in Column 5 was understated by 19 shares in the Original Form 4\nand in subsequent Forms 4 filed by the reporting person. This amendment is being filed to report correctly the number of shares withheld and the\ntotal number of shares beneficially owned following the transactions reported in the Original Form 4."}],"balance_after":11503,"source":{"system":"sec-edgar","filing":"0001209191-18-051087","document":"doc4a.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/868780/000120919118051087/doc4a.xml","form_type":"4/A","original_submission_date":"2017-02-14"}},{"id":3848973,"issuer":{"id":4084,"kind":"organization","name":"Dorman Products, Inc.","symbol":"DORM"},"owners":[{"id":82387,"kind":"person","name":"DARBY JEFFERY","position":1,"cik":"0001544758","reported_name":"DARBY JEFFERY","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Sales and Marketing"}}],"security":"Common Stock","published_at":"2018-08-09T15:15:47.000Z","date":"2018-08-07","kind":"tax_withholding","acquired":false,"shares":285,"price":74.55,"value":21246.75,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"These shares were withheld by the Issuer to satisfy Mr. Darby's tax withholding obligations. 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These shares were sold in multiple transactions at prices ranging from $76.02 to $76.24. 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."}],"balance_after":12639,"source":{"system":"sec-edgar","filing":"0001209191-18-045963","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/868780/000120919118045963/doc4.xml","form_type":"4"}},{"id":3999605,"issuer":{"id":4084,"kind":"organization","name":"Dorman Products, Inc.","symbol":"DORM"},"owners":[{"id":82387,"kind":"person","name":"DARBY JEFFERY","position":1,"cik":"0001544758","reported_name":"DARBY JEFFERY","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Sales and Marketing"}}],"security":"Common Stock","published_at":"2018-03-13T17:36:15.000Z","date":"2018-03-09","kind":"sale","acquired":false,"shares":100,"price":72.8,"value":7280.0,"ownership":{"direct":true},"balance_after":14066,"source":{"system":"sec-edgar","filing":"0001209191-18-019059","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/868780/000120919118019059/doc4.xml","form_type":"4"}},{"id":4004356,"issuer":{"id":4084,"kind":"organization","name":"Dorman Products, Inc.","symbol":"DORM"},"owners":[{"id":82387,"kind":"person","name":"DARBY JEFFERY","position":1,"cik":"0001544758","reported_name":"DARBY JEFFERY","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Sales and Marketing"}}],"security":"Common Stock","published_at":"2018-03-09T18:16:28.000Z","date":"2018-03-07","kind":"grant","acquired":true,"shares":3772,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The option vests in four equal annual installments beginning on March 7, 2019, which is the first anniversary of the date of grant."}],"balance_after":3772,"derivative":{"exercise_price":72.55,"expiration_date":"2023-03-07","underlying":"Common Stock","underlying_shares":3772},"source":{"system":"sec-edgar","filing":"0001209191-18-018415","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/868780/000120919118018415/doc4.xml","form_type":"4"}},{"id":4004355,"issuer":{"id":4084,"kind":"organization","name":"Dorman Products, Inc.","symbol":"DORM"},"owners":[{"id":82387,"kind":"person","name":"DARBY JEFFERY","position":1,"cik":"0001544758","reported_name":"DARBY JEFFERY","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Sales and Marketing"}}],"security":"Common Stock","published_at":"2018-03-09T18:16:28.000Z","date":"2018-03-07","kind":"tax_withholding","acquired":false,"shares":243,"price":72.55,"value":17629.65,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"These shares were withheld by the Issuer to satisfy Mr. Darby's tax withholding obligations. 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