The GM L5P Duramax found in the 2017-newer GM HD pickup trucks is rated at 445hp and 910 lb-ft of torque is powered by the Denso HP4 fuel injection pump rated to run up to 29,000 psi. The Denso HP4 fuel injection pump matched with Denso G4S diesel fuel injectors is GM answer to maximizing the engine horsepower and longevity that most people come to expect out of their Duramax Diesel.
