Spec Clutch SB804 Stage 4 Performance Clutch Kit

The Spec Clutch SB804 Stage 4 Clutch Kit is engineered for heavily modified and high-output engines where maximum torque capacity, instantaneous engagement, and reduced rotating mass are critical. This is a purpose-built competition clutch designed for drivers who demand uncompromising performance on the track.

The Stage 4 is a solid-hub evolution of the Stage 3, featuring a high-clamp pressure plate paired with a carbon semi-metallic friction disc in your choice of 3, 4, or 6-puck configurations. The solid 8-rivet hub is heat-treated for strength and long-term durability under extreme load conditions. Use the 3-puck disc for the lightest rotating assembly, or select the 6-puck for slightly smoother engagement while retaining full race-level torque capacity.

Kit Includes:

• High-clamp performance pressure plate
• Carbon semi-metallic puck friction disc (3, 4, or 6-puck — configuration varies by application)
• Solid 8-rivet heat-treated hub and carrier assembly
• Release bearing
• Installation tool kit

Intended Use:

• Drag Racing
• Drifting
• Road Racing
• Rally
• Pulling
• Circle Track

Note: The Stage 4 clutch features a rigid hub design with harsh, instantaneous engagement characteristics. It is not recommended for street use and is intended exclusively for competition and race applications.