Spec Clutch ST424 Stage 4 Clutch Kit - Carbon Semi-Metallic Puck Disc

The Spec Clutch ST424 Stage 4 Clutch Kit is a high-performance, competition-grade clutch system engineered for heavily modified engines where maximum torque capacity, instantaneous engagement, and reduced rotating mass are critical. As the solid hub evolution of the Stage 3, this kit steps up the aggression with a rigid hub assembly built to handle the demands of serious motorsport applications.

Key Features:

• High-clamp pressure plate for maximum clamping force and torque transfer
• Carbon semi-metallic friction disc available in 3-puck, 4-puck, or 6-puck configurations — choose 3-puck for the lightest rotating assembly or 6-puck for the smoothest engagement among puck options
• Solid 8-rivet hub with heat-treated carrier assembly for exceptional strength and long-term durability under race conditions
• High-torque rigid hub and disc assembly designed to eliminate slippage under peak power loads
• Includes release bearing and installation tool kit for a complete installation package
• Designed, hand-built, and tested in the U.S.A.

Intended Use: Drag racing, drifting, road racing, rallying, pulling, and circle track. Note: The Stage 4's rigid hub design results in harsh, instantaneous engagement and is not recommended for street or daily driving use.