Spec Clutch ST63ST Super Twin Multi-Disc Clutch Kit ST-Trim 700-1500 ft-lbs

The SPEC ST63ST Super Twin Multi-Disc Clutch Kit (ST-Trim) is a high-performance dual-disc clutch system engineered for street and track applications demanding extreme torque capacity. Rated to handle 700–1,500 ft-lbs of torque, this kit delivers the power management required for heavily modified, turbocharged, and high-output builds without sacrificing everyday drivability.

Built entirely from billet materials, the Super Twin is precision-machined to an industry-leading .001-inch tolerance for perfect rotational balance and smooth actuation. Aircraft-grade aluminum and high-carbon billet steel construction keep weight in check while maximizing strength and longevity. Friction is handled by dampened, full-faced carbon graphite discs, providing consistent, predictable engagement across all driving conditions.

Key Features:

• Torque capacity: 700–1,500 ft-lbs — suitable for extreme horsepower builds
• All-billet construction: aircraft-grade aluminum and high-carbon billet steel
• Precision-milled to .001-inch tolerance for perfect balance and actuation
• Dampened, full-faced carbon graphite friction discs
• Near-stock drivability with maintenance-free operation
• No shimming or setup required — direct bolt-in installation
• Infinitely rebuildable by SPEC or the end user; replacement components always available
• Smooth and quiet operation thanks to full billet assembly
• Organic, fiber, and full-metallic friction disc options available
• SFI Approved construction
• Includes flywheel and track-spec hardware

Suitable Driving Disciplines: Street, Drag, Drift, Road Racing, Time Attack, Pulling, Rallye

The SPEC Super Twin ST-Trim kit is a complete, ready-to-install solution for drivers who demand maximum torque capacity without compromising street manners. The fully rebuildable design ensures long-term value, and SPEC's rebuild service is always available for ongoing maintenance.