The 6.7L Cummins Turbodiesel has been the backbone of Ram heavy-duty trucks for well over a decade. As competition between diesel manufacturers intensified, Cummins introduced a steady stream of upgrades—boosting power, refining emissions systems, and strengthening internal components to handle ever-increasing torque.

Below is the complete model-year breakdown from 2009 through 2025, including horsepower, torque, emissions changes, and major mechanical upgrades.