Spec Clutch SF48S Super Twin Multi-Disc Clutch Kit

The Spec Clutch SF48S Super Twin Multi-Disc Clutch Kit is an all-billet, dual-disc performance clutch assembly engineered for street and track use in high-horsepower vehicles producing 700 to 1,500 lb-ft of torque. Designed as a bolt-in replacement requiring no shimming or setup, the Super Twin delivers near-stock drivability alongside tremendous life expectancy and fully maintenance-free operation.

Constructed from aircraft-grade aluminum and high-carbon billet steel, each Super Twin assembly is machined to industry-leading .001-inch tolerances for perfect balance and precise actuation. The all-billet pressure plate and twin-disc design provide exceptional holding power without demanding excessive clamping force, keeping pedal effort manageable even under extreme conditions.

The SF48S is available in multiple trim levels to match your specific power level and driving application:

• SS-Trim – Carbon composite/Kevlar hybrid disc; rated up to 900 lb-ft; ideal for high-powered street use
• P-Trim – Carbon composite 6-paddle unsprung hub disc; aggressive but streetable engagement with high torque capacity
• ST-Trim – Full-face carbon composite disc using Stage 3+ friction material; higher torque capacity than P-Trim
• E-Trim – Carbon composite full-face disc; elevated torque rating for demanding track and race applications
• ET-Trim – Sintered iron full-face disc; maximum friction coefficient for up to 1,500+ lb-ft; race-focused use

Friction is supplied by dampened, full-face carbon graphite discs (material varies by trim level), ensuring smooth engagement characteristics across all performance levels. Each kit includes the flywheel and track-spec hardware for a complete installation. The Super Twin is fully rebuildable by SPEC or the end user, with replacement components and rebuild services always available — making it a long-term investment for any serious performance build.

Suitable driving applications include: street, drag racing, drifting, road racing, time attack, rallye, and pulling.