<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
  <!-- Generated by Workiva -->
  <headerData>
    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001206109</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0000868780</issuerCik>
      <issuerName>DORMAN PRODUCTS. INC</issuerName>
      <secFileNumber>000-18914</secFileNumber>
      <issuerAddress>
        <com:street1>3400 E WALNUT ST</com:street1>
        <com:city>COLMAR</com:city>
        <com:stateOrCountry>PA</com:stateOrCountry>
        <com:zipCode>18915</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>2159971800</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>MARC BERMAN</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>FAMILY MEMBER</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>COMMON</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>MERRILL LYNCH</name>
        <address>
          <com:street1>470 NORRISTOWN RD</com:street1>
          <com:street2>SUITE 1010</com:street2>
          <com:city>BLUE BELL</com:city>
          <com:stateOrCountry>PA</com:stateOrCountry>
          <com:zipCode>19422</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>18000</noOfUnitsSold>
      <aggregateMarketValue>2304000</aggregateMarketValue>
      <noOfUnitsOutstanding>30562644</noOfUnitsOutstanding>
      <approxSaleDate>12/16/2025</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>COMMON</securitiesClassTitle>
      <acquiredDate>01/29/1987</acquiredDate>
      <natureOfAcquisitionTransaction>PAYMENT OF FOUNDER STOCK IN EXCHANCE FOR OWNERSHIP INTEREST IN PARTNERSHIP</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>BREP INC, JORDAN BERMAN, RICHARD BERMAN, STEVEN BERMAN, FRED BERMAN, MARC BERMAN</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>18000</amountOfSecuritiesAcquired>
      <paymentDate>01/29/1987</paymentDate>
      <natureOfPayment>EQUITY</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <securitiesSoldInPast3Months>
      <sellerDetails>
        <name>S BERMAN 2005 TRUST</name>
        <address>
          <com:street1>PO BOX 27039</com:street1>
          <com:city>PHILADELPHIA</com:city>
          <com:stateOrCountry>PA</com:stateOrCountry>
          <com:zipCode>19118</com:zipCode>
        </address>
      </sellerDetails>
      <securitiesClassTitle>COMMON</securitiesClassTitle>
      <saleDate>12/16/2025</saleDate>
      <amountOfSecuritiesSold>72000</amountOfSecuritiesSold>
      <grossProceeds>10868949</grossProceeds>
    </securitiesSoldInPast3Months>
    <remarks>SALE IS RELYING ON THE FOUR WEEK TRADING VOLUME FOR THE WEEK ENDING 12/12/2025.  SECURITIES BEING SOLD FOR THREE TRUST ACCOUNTS, THE STEVEN BERMAN 2005 TRUST FOR THE BENEFIT OF HIS THREE CHILDREN, MARC BERMAN IS THE TRUSTEE OF THESE ACCOUNTS</remarks>
    <noticeSignature>
      <noticeDate>12/16/2025</noticeDate>
      <signature>MARC BERMAN</signature>
    </noticeSignature>
  </formData>
</edgarSubmission>
