4BT / 6BT

The Cummins B Series engine, particularly the legendary 6BT, is widely recognized for its dominance in the pickup truck market, famously powering Dodge and RAM heavy-duty trucks like the Ram 2500 and 3500. Known as the "12-valve" or "24-valve" Cummins, these engines transformed the Ram lineup into a powerhouse, offering diesel durability in a consumer-friendly package. Beyond factory installations, the B Series is the top choice for engine swaps and custom builds. Automotive enthusiasts frequently install the compact 4BT into Jeep Wranglers, Chevrolet pickups, and even Ford trucks to gain unmatched fuel economy and reliability. Whether you are restoring a classic Dodge Ram or upgrading a modern RAM truck with more horsepower, our parts ensure your Cummins B Series engine delivers the legendary performance that has made it an icon on and off the road.