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Cummins Copper Injector Seal - 03-18 Dodge Cummins - 3937142

Thoroughbred Sku #: CUM3937142
Manufacturer Sku #: 3937142


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Product Details

Product Name: Copper Injector Seals - 03-18 Dodge Cummins
Manufacturer: Cummins
Manufacturer Part #: 3937142
Thoroughbred Diesel Part #: CUM3937142
Fitment Notes: Cummins Copper Injector Seal - 2003-2018 Dodge Cummins 5.9L - 3937142

Thoroughbred Diesel is your source of diesel stock parts for your Dodge Diesel. We are also a real diesel repair shop that works on diesel trucks for free advice call toll free at 866-737-4966 or shop now for 2003-2018 Dodge Diesel Copper Injector Seals. At Thoroughbred Diesel we specialize in stock parts for Dodge Cummins Diesels Trucks so save big bucks by shopping for replacement stock parts at ThoroughbredDiesel.com.


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  • Do these fit loosely like the ones that come on new bosch injrctors or do these little creases make them fit better as i put a bosch one on and they came off during removal wich is infuriating. I had to take my new i jectors out because it was running like crap because guy i had stud head must have not used sn ekephant foot so intake vakve was stuck open when i added one i thaught fell off or lost, so anyways im not dumb i got thr lashing good now and want washers thatll stick on tip now. Lol

    Leo | 3/6/2026

    These are Cummins OE replacements.