Spec Clutch SU333 Stage 3 Performance Clutch Kit 6-Puck Carbon Semi-Metallic

The SPEC SU333 Stage 3 Clutch Kit is a high-performance clutch system built around a carbon semi-metallic 6-puck sprung hub disc — widely recognized as the leading puck-style clutch in drivability, longevity, and torque capacity. Engineered to deliver aggressive yet streetable engagement, this kit is an ideal upgrade for high-performance street builds and track-driven applications that demand more than a stock clutch can offer.

The disc assembly uses a double-sprung hub with spring cover reliefs for added flexibility under load, while heat-treated internal components provide the strength and durability needed for sustained high-torque use. The included high-clamp pressure plate maximizes clamping force, and the carbon-graphite friction material delivers consistent, repeatable grip across a wide range of operating temperatures. Also available in a 3-puck configuration for applications where engagement characteristics differ.

Key Features:

• Carbon semi-metallic 6-puck sprung hub disc — proven leader in puck clutch drivability and torque capacity
• High-clamp pressure plate for maximum clamping force
• Carbon-graphite friction material for consistent, high-temp grip
• Double-sprung hub with spring cover reliefs for flexibility
• Heat-treated components for long-term strength and durability
• 9.000 in. disc diameter with 24-spline input shaft, 0.938 in. diameter
• Bearing and tool kit included
• Also available in 3-puck configuration

Ideal Applications:

• Street performance
• Drag racing
• Road racing
• Autocross
• Pulling
• Rally and drift

The SPEC Stage 3 occupies the sweet spot in SPEC's performance lineup — more aggressive than the Stage 2+, yet still manageable for daily driving. Every SPEC clutch kit is SFI approved, reflecting the brand's commitment to engineering precision and motorsport-grade quality.