Spec Clutch SD80ST Super Twin ST-Trim Multiplate Clutch Kit

The SPEC SD80ST Super Twin ST-Trim is a dual-disc, multiplate clutch kit engineered for high-output street and track builds handling between 700 and 1,500 ft-lbs of torque. Despite its extreme torque capacity, the Super Twin is designed to deliver near-stock drivability — making it a viable option for vehicles that see both daily road use and competition duty.

Built to exacting standards, the Super Twin features all-billet construction using aircraft-grade aluminum and high-carbon billet steel. All components are precision-milled to an industry-leading .001-inch tolerance, ensuring perfect rotational balance and consistent clutch actuation. The dampened, full-faced carbon-graphite friction discs (ST-Trim) provide smooth, quiet engagement under all operating conditions.

Key Features:

• Rated for extreme torque applications from 700 to 1,500 ft-lbs
• ST-Trim carbon composite, full-face disc with sprung hub for street-friendly engagement
• Aircraft-grade aluminum and high-carbon billet steel construction
• Precision-milled to .001-inch tolerance for perfect balance and actuation
• Dampened, full-faced carbon-graphite friction discs
• Near-stock drivability with no shimming or setup required — true bolt-in installation
• Maintenance-free operation
• Rebuildable by SPEC or the end user; replacement components always available
• Flywheel and track-spec hardware included in each kit
• Organic, fiber, and full-metallic friction disc options also available

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