Spec Clutch ST63PT Super Twin Multi-Plate Clutch Kit P-Trim

The Spec Clutch ST63PT Super Twin P-Trim is a multi-plate clutch kit engineered for high-output street and track vehicles producing between 700 and 1,500 ft-lbs of torque. Despite its race-ready capability, the Super Twin delivers near-stock drivability with smooth, quiet engagement — making it equally at home on the street as it is on the track.

Built entirely from billet materials, the Super Twin is precision-machined from aircraft-grade aluminum and high-carbon billet steel, held to an industry-leading .001-inch tolerance for optimal balance and actuation. Friction is provided by dampened, full-faced carbon graphite discs, with organic, fiber, and full-metallic disc options also available to match your specific driving demands.

Key Features:

• Handles 700–1,500 ft-lbs of torque for extreme horsepower applications
• Near-stock drivability with smooth, quiet billet construction
• Aircraft-grade aluminum and high-carbon billet steel machined to .001-inch tolerance
• Dampened, full-faced carbon graphite friction discs (organic, fiber, and full-metallic options available)
• Infinitely rebuildable billet flywheel included
• New master cylinder and billet slave cylinder with stainless lines and fittings included
• Direct bolt-in installation — no shimming, fabrication, or setup required
• Rebuildable by SPEC or the end user; replacement components always available
• SFI approved
• Flywheel and track-spec hardware included in every kit

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