Spec Clutch SH225 Stage 5 Sintered Iron Full-Face Clutch Kit

The Spec Clutch SH225 Stage 5 Clutch Kit is a race-grade sintered iron clutch system engineered for maximum power transfer in high-performance and competition environments. Built around a full-metallic disc with the highest possible friction coefficient, this kit delivers the aggressive clamping force and holding power demanded by drag racing, pulling, and extreme street applications.

The solid 12-rivet hub and disc assembly is heat-treated for enhanced strength and long-term durability under repeated hard launches and sustained high-load use. The high-clamp pressure plate maximizes clamping force, ensuring the clutch holds up where stock and mid-level performance units fall short. While technically street-drivable, the Stage 5 is not intended for comfortable daily driving — it is purpose-built for competition.

Key Features:

• Full-metallic sintered iron friction disc — highest available friction coefficient for maximum torque transfer
• High-clamp pressure plate — aggressive clamping load for demanding race applications
• Solid 12-rivet hub and disc assembly — heat-treated for strength and durability
• 8.375-inch disc diameter with 20-spline input shaft interface (0.844 in. shaft diameter)
• Bearing and tool kit included (application dependent)
• Flywheel not included

Intended Use: Drag racing, tractor pulling, autocross, and extreme performance street use. Not recommended as a primary daily-driver clutch due to harsh engagement characteristics.