Spec Clutch ST133 Stage 3 Performance Clutch Kit

The SPEC ST133 Stage 3 Clutch Kit is engineered for heavily modified street and race applications that demand serious torque capacity without sacrificing daily drivability. Designed and hand-built in the U.S.A., this kit strikes the ideal balance between aggressive performance and a comfortable, streetable pedal feel.

At the heart of the Stage 3 kit is a carbon semi-metallic 6-puck sprung hub disc — the industry benchmark for puck clutch drivability, service life, and torque capacity. A 4-puck disc configuration can also be specified at time of ordering for certain applications. The hub features a double-sprung design with spring cover relieves for added flexibility, while heat-treated components deliver long-term strength and durability under both low and high-stress conditions.

Kit Includes:

• High clamp performance pressure plate
• 4 or 6-puck carbon semi-metallic friction disc (6-puck standard on most applications)
• High torque sprung hub and disc assembly
• Release bearing
• Installation tool kit

Intended Use:

• Street Performance
• Drag Racing
• Drift
• Road Racing
• Rallye
• Pulling
• Autocross

Installation Note: If not using a new SPEC flywheel, the existing flywheel must be resurfaced prior to installation to ensure proper friction surface integrity. A minimum 450-mile break-in period is required before full-throttle engagement or speed shifting.