Spec Clutch ST852 Stage 2 Performance Clutch Kit with Kevlar Disc

The SPEC ST852 Stage 2 Clutch Kit is a high-performance clutch solution engineered for mild to moderately modified naturally aspirated and power-adder engines, while also delivering exceptional results at stock power levels. It strikes the ideal balance between street drivability and elevated performance, making it equally at home on the daily commute or at the track.

At the heart of the Stage 2 kit is a segmented or full-faced pure Kevlar disc with steel backing. This friction material delivers excellent street drivability on par with the Stage 1, while providing a step up in torque capacity and service life. The hub features a double-sprung design with spring cover reliefs for added flexibility, along with heat-treated components for long-term strength and durability.

Key Features:

• High-clamp pressure plate for increased torque holding capacity
• Segmented or full-faced pure Kevlar friction disc with steel backing
• Double-sprung hub with spring cover reliefs for smooth, flexible engagement
• Heat-treated hub components for enhanced durability
• Includes release bearing and installation tool kit (select models)
• 21-spline input shaft, 1.125 in. diameter
• 9.500 in. (241mm) disc diameter

Recommended Driving Applications: Street, Drag, Pulling, Autocross

The SPEC Stage 2 is the smart upgrade for drivers seeking better longevity and higher torque capacity than a stock or Stage 1 clutch, without sacrificing the smooth daily engagement characteristics needed for regular street use.