Still a 6.7-liter mill, the yet-unconfirmed Cummins turbo diesel for the 2025 Ram HD purportedly sports a new intake manifold. Still relying on hydraulic lifters and similar valvetrain componentry ...

There are few critical choices to make in terms of the latest heavy-duty trucks, such as whether you should opt for a 6.4 HEMI or a 6.7 Cummins for your RAM 2500 engine. But one of the less-talked ...