The Edelbrock supercharger Stage 1 Street System part #15620 compatible with 2015-2015 Camaro SS with an automatic transmission increases the performance of your L99 engine to 421 horsepower and 439 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 assembly with a four-lobe design with 160 degrees of twist for maximum flow