Introduced in 2001, the Duramax V8 turbo diesel family was continuously improved over the years until the L5P that GM uses in heavy-duty trucks. Fully stock, the 6.6-liter mill develops 445 horsepower ...

The world of diesel performance has undergone a tremendous amount of change in recent years. For all intents and purposes, on newer pickup trucks, SUVs, and vans, gone are the days of individuals—and ...