We carry new and remanufactured crankshaft main bearings, front and rear seals for Cummins 3.9 and 5.9 liter engines. For your convenience, you can access our inventory through the product links listed below.
If you do not see the B Series part you need, please use our quote request form or call us at 855.470.3525: our friendly sales staff will gladly help you.
REAR CRANKSHAFT SLEEVE - B / C SERIES
MAIN BEARING SET - 4B (STANDARD)
FRONT CRANKSHAFT SLEEVE - B SERIES
MAIN BEARING SET - 6B (STANDARD)
REAR CRANKSHAFT OIL SEAL KIT - B / ISB / C SERIES
MAIN BEARING SET - 4B (.50MM OVERSIZED)
MAIN BEARING SET (STANDARD)
MAIN BEARING SET - 4B (.25MM OVERSIZED)
MAIN BEARING SET - 6B (.25MM OVERSIZED)
MAIN BEARING SET - 6B (.50MM OVERSIZED)