445 horsepower and 910 pound-feet are the crank ratings, namely 451 PS and 1,234 Nm in the metric system. As with any other turbo diesel for heavy-duty trucks, the L5P Duramax delivers maximum ...

The Duramax L5P was launched in 2017 and made an appearance in models like the 2017 GMC Sierra HD and the 2017 Chevrolet Silverado HD. Producing 445 hp and 910 lb-ft of torque, this was one of GM ...

The L5P also uses an intake rocker-arm with a 1.39 ratio and exhaust arm with a 1.69 ratio, which increases the camshaft’s total lift to 0.540 inch (intake) and 0.664 inch (exhaust).

A 2017 GMC Sierra 2500HD Denali with a Banks Power Derringer is run on the dyno before and after installing a Banks Ram-Air intake and Monster Exhaust.

The Duramax V8 L5P has a displacement of 6.6 liters, which is slightly smaller than the 6.7L engines offered by Ford and Ram. Despite this, the L5P delivers 470 horsepower at 2,800 rpm, making it ...