The 6.7L Cummins turbo diesel produces 350 hp at 3,013 rpm. This engine achieves peak torque of 650 lb-ft at 1,500 rpm for the automatic transmission configuration and maintains that peak torque all the way to 2,800 rpm (a "best in class" capability for a heavy-duty diesel pickup). An integrated exhaust brake is standard. Utilizing the 6.7L engine's turbocharger, the exhaust brake provides added vehicle control and vehicle brake savings by transforming horsepower into braking power. This extends the vehicle brake life. Testing has also shown more than a 30-percent improvement in engine retarding torque at 2,000 rpm compared with aftermarket exhaust brakes. We run with it switched on at all times.