COMP Cams GM LS3/LS4 HV Series Camshaft LS272PU-12This COMP Cams HV NSR cam is designed for GM cathedral port 4. 8L 5. 3L 6. 0L powered vehicles. It provides amazing drivability and throttle response while also requiring minimal tuning. Torque is increased across the entire operating range while still producing +69 horsepower at peak. Get the most out of your daily driver truck, SUV or 4x4 without sacrificing street manners. The NSR HV cam will provide a deep rumble with a mild, yet noticeable lope.