Spec Clutch SB035 Stage 5 Performance Clutch Kit Full-Metallic

The SPEC SB035 Stage 5 Clutch Kit represents the top of SPEC's single-disc performance clutch lineup, engineered for extreme performance applications demanding maximum torque capacity and aggressive engagement. Built around a full-metallic disc with the highest possible friction coefficient available, this kit delivers uncompromising grip and holding power for serious motorsport use.

The disc assembly features a solid 12-rivet hub that is heat treated for exceptional strength and long-term durability under repeated hard launches and high-load conditions. The kit includes a high-clamp billet non-SAC pressure plate designed to maximize clamping force, ensuring the clutch holds firm even under extreme power and torque demands. A bearing and tool kit are also included on select applications.

Key Features:

• Full-metallic friction disc with maximum friction coefficient for ultimate grip
• Solid 12-rivet hub — heat treated for strength and durability
• High-clamp billet non-SAC pressure plate
• Rigid, unsprung iron disc assembly for immediate, decisive engagement
• Compatible with both billet single-mass and OE dual-mass flywheel configurations (application dependent)
• Bearing and tool kit included on select applications

Intended Use: Drag Racing, Tractor Pulling, Autocross, Extreme Street

Important Note: The Stage 5 is street-drivable but not street-friendly due to its aggressive, progressive torque-induced engagement characteristics. This clutch is best suited to heavily modified or dedicated race vehicles. Consulting a SPEC technical specialist prior to ordering is strongly recommended to ensure proper configuration for your specific application.