Best 12v 5.9 Cummins Upgrades
Among diesel truck enthusiasts, the 12-valve 5.9 Cummins has long been regarded among top engines. The original 12-valve Cummins turbo-diesel lasted from 1989–1999, making 160–215 horsepower and 400–440 lb-ft of torque inside the Dodge Ram. For the time this was pretty exceptional, but nowadays it’s relatively pedestrian by turbo-diesel standards. Luckily, there are a myriad…