Cummins engines were dominant in agriculture long before their debut in heavy-duty trucks. The 12-valve 5.9-liter Cummins I-6 engine was developed and installed in Dodge pickups starting in 1989 ...

Producing up to 460 pound-feet of torque, a 5.9-liter Cummins inline-six engine was also offered as an option. The Ram 2500 could tow up to 14,000 pounds depending on the engine and drivetrain. One ...