Spec Clutch SP163 Stage 3 Performance Clutch Kit - Carbon Semi-Metallic 6-Puck

The Spec Clutch SP163 Stage 3 Clutch Kit is engineered for heavily modified street and race vehicles that demand high torque capacity without sacrificing everyday drivability. Featuring an aggressive yet streetable engagement feel, this kit delivers confident power transfer for performance builds while remaining manageable under normal driving conditions.

At the heart of the Stage 3 kit is a carbon semi-metallic 6-puck sprung hub disc — a proven design recognized for its outstanding balance of drivability, service life, and torque handling. The hub uses a double-sprung design with spring cover reliefs for added flexibility, while heat-treated internal components provide enhanced strength and long-term durability under extreme stress.

Kit Includes:

• High-clamp performance pressure plate
• Carbon semi-metallic 6-puck sprung hub disc assembly (4-puck configuration available upon request)
• High-torque sprung hub and disc assembly
• Release bearing and installation tool kit

Key Features:

• Carbon semi-metallic friction material for exceptional heat resistance and consistent torque transfer
• High-clamp pressure plate for firm, positive engagement under high-load conditions
• Double-sprung hub with spring cover reliefs for smooth engagement and vibration damping
• Heat-treated hub components for maximum strength and durability
• Also available in 3-puck configuration for select applications
• 23-spline input shaft compatibility (application-specific — verify fitment)

Ideal Driving Applications: Street performance, drag racing, road racing, drifting, rallye, pulling, and autocross.

The Spec Clutch Stage 3 Kit is the go-to upgrade for performance enthusiasts who need a clutch that can handle serious power while still offering the pedal feel and engagement characteristics required for street use.