Spec Clutch SH145 Stage 5 Race Clutch Kit - Full-Metallic Disc

The SPEC SH145 Stage 5 Clutch Kit is SPEC's highest-performance single-disc clutch offering, purpose-built for serious drag racing, pulling competitions, and any application requiring maximum torque capacity and immediate, aggressive engagement. Rated to handle up to 545 ft-lbs of torque at the flywheel, this race-grade kit delivers uncompromising grip where it counts most.

Key Features:

• Full-metallic sintered iron disc with the highest available friction coefficient for maximum torque transfer
• Unsprung, rigid disc assembly with instant, aggressive engagement — ideal for drag launches and high-load pulling applications
• Solid 12-rivet hub heat-treated for exceptional strength and long-term durability under race conditions
• High-clamp pressure plate engineered to hold power in extreme-output applications
• SFI approved — meets sanctioning body requirements for competitive racing
• Designed and hand-built in the USA

Kit Includes: High-clamp pressure plate, full-metallic rigid iron disc assembly, and installation tool kit.

Important Note: The Stage 5 is a race-only clutch. It is not recommended for street driving due to its harsh, unsprung engagement characteristics. This kit is best suited for dedicated drag cars, pulling vehicles, or builds specifically requiring a slipper/progressive torque-induced engagement style. Stages 1–3+ are recommended for street or street/strip applications.