Spec Clutch ST63ET-2 Super Twin E-Trim Multi-Disc Clutch Kit

The SPEC ST63ET-2 Super Twin E-Trim is a high-performance dual-disc clutch kit engineered for vehicles producing extreme horsepower and torque. Rated to handle 700–1,500 ft-lbs of torque, this multi-plate assembly is built for demanding street and track applications including drag racing, road racing, time attack, drifting, rallye, and pulling events.

Despite its race-bred capability, the Super Twin delivers near-stock pedal feel and drivability, making it a practical solution for high-powered street-driven vehicles. The no-shimming, no-setup required bolt-in design simplifies installation, and the maintenance-free design means you spend more time driving and less time wrenching.

Key Features:

• Torque capacity: 700–1,500 ft-lbs — suitable for extreme horsepower builds
• Constructed from aircraft-grade aluminum and high-carbon billet steel, milled to an industry-leading .001-inch tolerance for perfect balance and smooth actuation
• Friction provided by dampened, full-faced carbon graphite discs for consistent, reliable engagement
• All-billet construction ensures smooth, quiet operation
• Infinitely rebuildable by SPEC or the end user — replacement components and rebuild services are always available
• Direct bolt-in installation — no shimming, fabrication, or special setup required
• Organic, fiber, and full-metallic disc options available
• Flywheel and track-spec hardware included in every kit

Approved driving types: Street, Drag, Drift, Road Racing, Time Attack, Pulling, and Rallye. The SPEC Super Twin E-Trim is designed, hand-built, and tested in the U.S.A., and every SPEC clutch kit and flywheel is SFI approved.