Spec Clutch SF464 Stage 4 Carbon Semi-Metallic Performance Clutch Kit

The Spec Clutch SF464 Stage 4 Clutch Kit is a purpose-built, high-performance clutch system engineered for heavily modified and race-dedicated vehicles. As the solid-hub evolution of the Stage 3, the SF464 delivers maximum torque capacity and instantaneous engagement for drivers who demand nothing less than race-level performance.

At its core, the Stage 4 features a solid 8-rivet hub with heat-treated components throughout, providing the structural integrity and durability needed to withstand the extreme forces of competitive motorsport. The kit is available in 3, 4, or 6-puck carbon semi-metallic friction disc configurations — choose the 3-puck for the lightest rotating mass, the 6-puck for the smoothest engagement among puck-style options, or the 4-puck as a balanced compromise between the two. Note: while the 6-puck configuration is technically street-drivable, the rigid solid hub design is not street-friendly and is intended primarily for racing use.

Key Features:

• High-clamp pressure plate for maximum clamping force
• Carbon semi-metallic friction material for aggressive, consistent bite
• Solid 8-rivet high-torque hub and disc assembly — heat-treated for strength and durability
• Available in 3, 4, or 6-puck disc configurations
• Torque capacity: 760 ft-lbs
• Includes release bearing and clutch alignment tool kit

Ideal Driving Applications: Drag Racing, Road Racing, Drifting, Rally, Pulling, Circle Track

The Spec SF464 Stage 4 is the choice for serious competitors running high-output engines where instantaneous clutch engagement and reduced rotating mass are critical to performance.