Cummins 4BT diesel engines built prior to 1998 made 105 hp and 265 lb-ft of torque. Those made after 1998 are known as 4BTA Cummins engines. Thanks to upgrades present in the 4BTA, horsepower ...

The Cummins 4BT might be a powerhouse, but the 6BT is the cream of the crop. It was included in Dodge Ram trucks from 1989 to 1998, and much like its 4BT counterpart, the 6BT was a strong off-road ...

The 239-cubic inch (3.9-L) Cummins 4BT turbodiesel engine is so capable that General Patton himself would've killed to equip his trucks with it.

Cummins introduced the 105-hp 4BT (4-cylinder, B-series, Turbocharged) in 1983. The original design, closely related to the legendary 5.9L 6BT Cummins, featured two valves (intake and exhaust) for ...