Edelbrock 15780 Stage 1 Supercharger for 2007-2013 Silverado Sierra 4.8L 5.3L W/O TuneEdelbrock Stage 1 Supercharger #15780 07 13 Silverado Sierra 4. 8L, 5. 3L W O Tune The Edelbrock supercharger Stage 1 Street system part #15780 for 2007 13 Silverado and Sierra 1500 increases the performance of your 5. 3L Gen IV engine to 364 horsepower and 397 ft lbs of torque at the rear wheels. With the 4. 8L Gen IV engine expect an increase to 334 horsepower and 380 ft lbs of torque at the rear wheels when used with Edelbrock tune (kit supplied