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Thoroughbred Diesel has been your online performance headquarters since 2002. We know how to get the most performance out of your pickup truck and offer all of today's most popular diesel performance products.
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Thoroughbred Diesel offers OEM and diesel stock parts for your diesel pickup truck. At Thoroughbred Diesel, you can buy stock diesel replacement parts such as injectors, fuel pumps, ball joints, track bars, turbos, and more for your diesel truck.
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Make heads turn with custom truck accessories from Thoroughbred Diesel.
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Thoroughbred Sku #: CUM3955121 Manufacturer Sku #: 3955121
Year/Make/Model: {{year}} {{make.Name}} {{model.Name}} Edit
$524.95
2003 - 2005 Dodge Ram 2500
2003 - 2005 Dodge Ram 3500
Product Name: Cummins Rocker Box - 2003-2005 Dodge Cummins 5.9L Manufacturer: Cummins Manufacturer Part #: 3955121 Thoroughbred Diesel Part #: CUM3955121 Fitment Notes: 2003-2005 Dodge Cummins 5.9L
Cummins 3955121 Rocker Box for your Cummins engine. Cummins has been a leader in the diesel industry for more than one hundred years. Maintain OEM function when you install this replacement part. This part mounts directly to the factory location for a hassle-free installation.
Cummins Rocker Box Features: