SPEC Stage 1 Clutch Kit for 2005 and up C6 & Z06 Corvette using OEM Flywheels

Types of Driving: Street, Drag, Drift, Road Race, Rallye, Pulling, Autocross

Features an integrally molded carbon kevlar-based, high performance organic lining that offers smooth engagement and excellent life. This lining has an integrally bonded steel backing for strength under high clamp loads and temperatures. The hub is double sprung with spring cover relieves for flexibility and heat treated components for strength and durability. Best for street and many track/off-road applications.

    * High clamp pressure plate
    * Steel-backed and multi-compound woven organic material
    * High torque sprung hub and disc assembly
    * Bearing and tool kit

Performance Kits
                           Stage 1,  Stage 2,  Stage 2+,  Stage 3,  Stage 3+,  Stage 4,  Stage 5 
Product Number:  SC661,  SC662,  SC663H,  SC663,  SC663F,  SC664,  SC665  
Torque Capacity:  550,  645,  715,  809,  900,  809,  1081

Billet Aluminum Pressure Plate Option: Substantially reduces rotating mass, increases power and throttle response , adds infinite rebuildability

SPEC billet flywheels are manufactured and developed for specific driving environments and recommended based on how each car reacts to changes in rotating mass. SPEC flywheels are NOT a one-fits-all lightweight flywheel, though they can be used for an array of driving habits and racing/high performance applications. Consult a SPEC representative for a recommendation. Manufactured from only the highest quality steel and aluminum, they are the only flywheels on the market manufactured to a .001 machine tolerance, guaranteeing a flat seating surface for the clutch and smooth rotational qualities for perfect balance and extended engine life.
http://www.c5racer.com/catalog/product_info.php?products_id=485617

These clutch kits are designed for use with SPEC flywheels or any aftermarket LS1/6 single mass flywheel, which bolt to the LS7 and offer a considerable reduction is rotating mass. These kits increase friction surface diameter to 12inches while reducing rotating mass by up to 36%. The SC57 flywheels are for use with non-stock clutch designs. For a flywheel to be used with the OE style clutch, use pn SC66A-2 or SC66S-2. The package includes race bolt kit and tool.