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Cummins ISB and QSB Engine Parts

Cummins ISB and QSB Engine Parts

When Cummins ISB or QSB diesel engines need parts for maintenance or repairs, Diesel Parts Direct should be your first stop. We have an extensive inventory of OEM and aftermarket parts for B-Series engines which will shorten your search. From the Cummins ISB 5.9 liter to the QSB 5.9, most parts are in stock and ready to ship.

Need help picking the right part? Check out our data sheets for the Cummins QSB line as well as selected ISB diesel engines, or give our customer service team a call. Our staff knows Cummins diesel and we’re here to help.

Trust Diesel Parts Direct to help keep your Cummins ISB or QSB diesel engines up and running.



Find Parts for Cummins ISB and QSB Engines



We carry a large assortment of new and remanufactured parts for ISB 3.9, ISB 5.9, QSB 4.5, QSB 5.9, and QSB 6.7 diesel engines.

For more information on ISB/QSB 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.

Get a Quote

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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