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Since 1918, Dorman parts have striven to provide a more reliable parts solution and an alternative to high priced "dealer only" OEM heavy duty parts.

Through the collection and examination of failed OEM parts Dorman engineers have been able to determine how and why parts fail. Even more importantly, they are able to redesign parts with a focus on reducing (or eliminating) common failure patterns. Better designs and better materials result in Dorman replacement parts that you can take advantage of – and BIGMachineParts.com is your complete source for replacement Peterbilt parts online.

With an eye towards saving you time and money, Dorman’s product teams solicit feedback from technicians and field professionals to properly understand everything that is required for a complete repair for some speci c parts. The input Dorman collects from professionals with firsthand experience is then leveraged into the development of Dorman Complete Kits – parts that provide you with everything needed to complete the job. One phone call, one part number – saves you money and cuts down on repair time.

Right Part. Right Now. That's BIG.