6] With a fairly flat torque curve between 4,500 and 5,000 rpm, Crane’s 1449371 cam reaches a peak of 500.9hp at 6,100 rpm. Torque was up 33 lb-ft. It provides excellent driveability and mileage with increased performance for a street vehicle. Duration at 0.050-inch lift is 216/232 (intake/exhaust). Lift with a 1.70 intake/exhaust rockers is 0.590-inch intake and 0.624 exhaust.