This is an ATI / Procharger C5 Twin HighFlow Air-to-Air Intercooled Stage II Supercharger Kit with a P-1SC-1 head unit and standard 6 rib pulley setup for the Corvette C5 1999-2004 (LS1) which will get you a 55% horsepower gain on just 7 psi of boost! This system is 100% complete, including handheld programmer, fuel system and tuning for stock vehicles or those with a catback only, just bolt on and drive! If you have other modifications such as headers, midpipe, camshaft, etc. then look at the Tuner kits.
Largest, Most Reliable Power Gains in the Industry.