Ford and Cummins’ diesel pickup power plants are 6.7 liters while GM’s Duramax is and always has been 6.6 liters. Increasing engine size may be the most logical next step, ...

Over at Stellantis, the Ram truck brand relies on the 6.7-liter Cummins ISB inline-six turbo diesel. Similar to crosstown rival Ford, what used to be Chrysler offers the Cummins-developed engine ...

Consider past launches from Cummins — the QSB 5.9-liter common-rail diesel was introduced in 2004 at 380 hp. It increased to 425 hp in 2006 and finally to 480 hp in 2008. The larger 8.3-liter QSC grew ...