Spec Clutch SH143 Stage 3 Performance Clutch Kit

The Spec Clutch SH143 Stage 3 Clutch Kit is engineered for heavily modified street and race applications that demand high torque capacity without sacrificing everyday drivability. Offering a comfortable pedal feel and quick, aggressive engagement, this kit strikes the ideal balance between street usability and competition-level performance.

At the heart of this kit is a carbon semi-metallic puck disc — available in a 4 or 6-puck configuration depending on the application — paired with a high-torque sprung hub assembly. The sprung hub is double-sprung with spring cover reliefs for enhanced flexibility, while heat-treated components deliver the strength and durability needed under both low and high-stress driving conditions.

Key Features:

• High-clamp performance pressure plate for increased clamping force
• Carbon semi-metallic 4 or 6-puck friction disc (6-puck standard on most applications)
• High-torque sprung hub and disc assembly — double-sprung for flexibility and heat-treated for durability
• Includes release bearing and installation tool kit
• Excellent wear characteristics under both street and race conditions
• SFI approved
• Made in the U.S.A.

Intended Use: Street, Drag, Drift, Road Race, Rallye, Pulling, Autocross

The Stage 3 sits within SPEC's street/strip lineup (Stages 1–3+) and is the go-to choice for drivers who need a high-performance clutch that remains manageable on the street. It delivers the torque capacity required for modified engines while maintaining the drivability expected for daily use.