The Stage 1 Pulley Kit can produce over 700 HP and 700 lb-ft of torque at the flywheel over a stock LT4 engine with proper tuning.

No other components are needed other than proper ECM re-calibration (not included) to achieve these results on your own LT4 powered Corvette. No changes to the exhaust or fuel system is required.

The Stage 1 Z06 kit includes:

• - ATI LT1/LT4 dry sump torsional vibration damper
• - ATI 15% overdrive balancer pulley
• - Pulley hardware
• - Green Back HD Supercharger belt
• - Metco Motorsports 100mm idler kit 
• - Crankshaft bolt 

Boost should increase 2.5 to 3 psi with installation of this kit

No changes in drivability with proper tuning