Spec Clutch SF235-2 Stage 5 Performance Clutch Kit

The Spec Clutch SF235-2 Stage 5 Clutch Kit is SPEC's highest-performing single-disc clutch, engineered for maximum grip in extreme street and motorsport applications. Built around a full-metallic sintered iron disc, this kit delivers the highest possible friction coefficient available in SPEC's single-disc lineup — providing instant, aggressive engagement that serious performance drivers demand.

While technically street drivable, the Stage 5 is purpose-built for drag racing, pulling, and autocross — not daily commuting. The unsprung, rigid disc engages quickly and with authority, making it ideal for high-powered builds that require progressive torque-induced engagement or a slipper-clutch characteristic at the limit.

The disc assembly uses a solid 12-rivet hub that is heat-treated for maximum strength and durability under extreme load cycles. A high-clamp pressure plate is included to match the demands of the full-metallic disc, ensuring consistent clamping force under sustained heat and abuse.

Key Features:

• Full-metallic sintered iron friction disc — highest friction coefficient in SPEC's single-disc range
• High-clamp performance pressure plate — matched to full-metallic disc demands
• Solid 12-rivet unsprung hub — rigid engagement, maximum torque transfer
• Heat-treated disc and hub assembly — built for strength and long-term durability
• Bearing and installation tool kit included — everything needed for a complete install
• SFI Approved — meets sanctioned racing safety standards

Ideal for extreme street use, drag racing, pulling events, and autocross, the SPEC Stage 5 is the top of the single-disc ladder and best suited for heavily modified vehicles where maximum torque capacity and engagement speed are the priority over street refinement.