Edelbrock Supercharger Stage 1 - Street Kit 2007-2013 GM Gmt900 Ls Cp 4 8L 5 3L and 6 0L w/ o TunerThe 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 without a programmer). The core of this system is the Eaton Gen VI 2300 TVS rotating