Spec Clutch SI225 Stage 5 Performance Clutch Kit with Full-Metallic Disc

The Spec Clutch SI225 Stage 5 Clutch Kit is engineered for drivers who demand maximum torque capacity from their drivetrain. Featuring a full-metallic sintered iron disc with the highest possible friction coefficient available in the SPEC lineup, this kit delivers uncompromising grip and power transfer. While technically street-drivable, the Stage 5 is purpose-built for extreme performance applications.

The disc assembly uses a solid 12-rivet unsprung hub that eliminates flex under high-load conditions, and the entire assembly is heat-treated for exceptional strength and long-term durability under racing stress. The high-clamp pressure plate works in concert with the full-metallic disc to maximize clamping force and torque handling.

Key Features:

• High-clamp pressure plate for maximum clamping force
• Full-metallic sintered iron friction material for the highest friction coefficient
• Solid 12-rivet unsprung hub and disc assembly for high-torque applications
• Heat-treated assembly for enhanced strength and durability
• Bearing and tool kit included

Ideal Driving Applications:

• Extreme street performance
• Drag racing
• Pulling competitions
• Autocross

The SPEC Stage 5 represents the top of the SPEC performance clutch hierarchy. It is sold as a complete kit, making it a straightforward upgrade for serious performance builds requiring maximum holding power.