Spec Clutch SD06ST Super Twin ST-Trim Multi-Disc Clutch and Flywheel Kit

The SPEC SD06ST Super Twin ST-Trim Multi-Disc Clutch Kit is engineered for high-demand street and track applications, handling extreme torque loads ranging from 700 to 1,500 ft-lbs. Despite its race-ready capability, the Super Twin delivers near-stock drivability, making it equally at home on a daily driver as it is on the drag strip, drift course, or road race circuit.

Constructed entirely from billet materials, the SD06ST uses aircraft-grade aluminum and high-carbon billet steel machined to an industry-leading .001-inch tolerance for perfect rotational balance and precise actuation. Friction is provided by dampened, full-faced carbon graphite discs, and the ST-Trim designation reflects the carbon composite disc configuration with an unsprung hub design.

Key Features:

• Torque capacity: 700–1,500 ft-lbs — suitable for heavily modified street and race vehicles
• Aircraft-grade aluminum and high-carbon billet steel construction machined to .001-inch tolerances
• Dampened, full-faced carbon graphite friction discs for smooth, consistent engagement
• No shimming or setup required — true bolt-in installation
• Maintenance-free operation with all-billet, smooth and quiet assembly
• User-rebuildable design; replacement components and rebuild services available directly from SPEC
• Includes billet steel flywheel and track-spec hardware
• SFI approved construction
• Designed, hand-built, and tested in the U.S.A.

Intended Use: Street, drag racing, drifting, road racing, time attack, pulling, and rallye.

The SPEC Super Twin line represents the pinnacle of SPEC's multi-disc clutch lineup, offering a rebuildable, long-life solution for vehicles that have outgrown single-disc performance clutches. Organic, fiber, and full-metallic friction disc options are also available for application-specific tuning.