Spec Clutch SL54ST Super Twin ST-Trim Multi-Disc Clutch Kit

The SPEC SL54ST Super Twin ST-Trim Multi-Disc Clutch Kit is a high-performance twin disc clutch system engineered for street and track applications demanding extreme torque handling capacity between 700 and 1,500 ft-lbs. Designed for builds where a standard single-disc clutch simply won't survive, the Super Twin delivers race-proven holding power without sacrificing everyday drivability.

Built entirely from billet materials, the Super Twin features aircraft-grade aluminum and high-carbon billet steel components machined to an industry-leading .001-inch tolerance for perfect balance and smooth actuation. Friction is handled by dampened, full-faced carbon graphite discs in the ST-Trim configuration, with organic, fiber, and full-metallic friction material options also available.

Key Features:

• Torque capacity: 700–1,500 ft-lbs — suitable for street, drag, drift, road racing, time attack, pulling, and rallye use
• Near-stock drivability for a twin-disc performance clutch system
• No shimming or setup required — true bolt-in installation
• Maintenance-free operation with all-billet construction for smooth, quiet engagement
• Fully rebuildable by SPEC or the end user; replacement components and rebuild services are always available
• Aircraft-grade aluminum and high-carbon billet steel machined to .001-inch tolerances
• Dampened, full-faced carbon graphite friction discs (ST-Trim)
• SFI Approved clutch and flywheel assembly
• Includes billet aluminum flywheel and track-spec hardware

Designed, hand-built, and tested in the USA, every SPEC Super Twin is manufactured and developed for specific driving environments. The kit includes everything needed for a complete installation, and the rebuild-friendly design ensures long-term serviceability for high-mileage performance builds.