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Cummins 4BT 3.9 and 6BT 5.9 Engine Parts

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Cummins B Series Engine Parts

The Cummins B Series is available in 4 and 6 inline cylinders. Because of the popular 3.9 and 5.9 liter models, it is known as the "one liter per cylinder" engine.

Cummins B Series diesel engines are used in various marine, military, construction and highway applications. They appeared in light-duty trucks in 1989 with the Dodge Ram.


Find Cummins B Series Parts



We carry a large assortment of aftermarket, genuine, and remanufactured parts for Cummins 4BT 3.9 and 6BT 5.9 diesel engines, including turbochargers, overhaul kits, injectors, and lift pumps.

For more information on B Series engines, please visit our Cummins engine specifications page.

Need Assistance?



If you need help selecting the right Cummins part for your needs, please use our quote request form. Provide as much information as you can about the parts you require and our knowledgeable staff will promptly answer your request.

You may also call us at 855.470.3525 to inquire about current pricing and availability of our products.

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Hundreds Of Items Guaranteed in Stock
Hundreds Of Items Guaranteed in Stock Click here for details
Great Selection of Block Heaters and Glow Plugs

GREAT SELECTION OF BLOCK HEATERS AND GLOW PLUGS

Everyday Free Ground Shipping on Select Overhaul Kits and Turbos
Everyday Free Ground Shipping on Select Overhaul Kits and Turbos Click here for details

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