Spec Clutch SN464 Stage 4 Clutch Kit - Carbon Semi-Metallic Puck Disc

The Spec Clutch SN464 Stage 4 Clutch Kit is engineered for heavily modified, high-output vehicles where maximum torque transfer, instantaneous engagement, and reduced rotating mass are critical. Built as a race-focused evolution of the Stage 3, this kit delivers uncompromising performance on the track.

At its core, the Stage 4 features a solid 8-rivet heat-treated hub assembly — eliminating the sprung hub dampers found in street-oriented stages to provide direct, immediate power transfer. The carbon semi-metallic friction disc is available in 3, 4, or 6-puck configurations to suit your specific performance needs: the 3-puck delivers the lightest rotating mass, the 6-puck offers the smoothest engagement of the available configurations, and the 4-puck strikes a balance between the two.

Kit Includes:

• High-clamp performance pressure plate
• Carbon semi-metallic puck friction disc (3, 4, or 6-puck — specify at time of order)
• High-torque solid rigid hub and carrier assembly
• Release bearing
• Alignment/installation tool kit

Intended Driving Applications:

• Drag Racing
• Drift
• Road Racing
• Rallye
• Pulling
• Circle Track

Important Note: Due to the rigid solid hub design, this clutch is not recommended for regular street use. The Stage 4 is classified as a race-only unit. Drivers requiring a street/strip dual-purpose setup should consider the Stage 3 or Stage 3+ instead. Every Spec clutch kit is SFI approved.