Spec Clutch ST734 Stage 4 Performance Clutch Kit - Carbon Semi-Metallic 6-Puck

The Spec Clutch ST734 Stage 4 Clutch Kit is a high-performance, race-oriented clutch system built for heavily modified engines that demand maximum torque handling and instant, aggressive engagement. As a solid hub evolution of the Stage 3, this kit steps up the durability and performance profile significantly for dedicated motorsport use.

Key Features:

• Solid 8-rivet hub — heat-treated for superior strength and long-term durability under high-stress conditions
• High-clamp pressure plate — delivers the increased clamping force required for high-output engines
• Carbon semi-metallic friction disc — available in 3, 4, or 6-puck configurations to match your specific performance needs
• Puck configuration options: 3-puck for the lightest rotating mass, 6-puck for the smoothest engagement, and 4-puck as an ideal compromise
• High-torque solid hub and disc assembly — engineered for race-level torque loads
• Bearing and tool kit included

Intended Use: The Stage 4 kit is a race-only clutch. While the 6-puck configuration offers slightly more manageable engagement, the rigid solid hub design makes this kit not recommended for street use. It is purpose-built for drag racing, road racing, rally, drifting, pulling, and circle track competition.

SPEC clutches are designed, hand-built, and tested in the U.S.A., and every SPEC Clutch Kit has been SFI approved.