This is an ATI / Procharger C6 3 Core Air-to-Air Intercooled Stage II Supercharger system with a P-1SC-1 head unit and additional dedicated 6 rib pulley setup for the Corvette C6 and Z06 2007-2013 (LS3, LS7) which will get you a 40-50% gain horsepower gain on just 7 psi of boost!