Spec Clutch ST63ST-2 Super Twin Multi-Disc Clutch Kit ST-Trim

The SPEC ST63ST-2 Super Twin ST-Trim Multi-Disc Clutch Kit is an SFI-approved, high-performance twin-disc clutch system engineered for street and track applications demanding extreme torque handling. Rated to handle 700–1,500 ft-lbs of torque, the Super Twin delivers near-stock drivability without sacrificing the durability and holding power required for high-horsepower builds. Suitable for street driving, drag racing, drifting, road racing, time attack, pulling, and rally use.

Constructed from aircraft-grade aluminum and high-carbon billet steel, each assembly is precision-milled to an industry-leading .001-inch tolerance for perfect balance and smooth actuation. The all-billet design results in a quiet, refined feel that sets the Super Twin apart from conventional multi-disc setups. Friction material is provided by dampened, full-faced carbon graphite discs, with organic, fiber, and full-metallic friction options also available.

Key Features:

• Handles 700–1,500 ft-lbs of torque — ideal for extreme horsepower builds
• Near-stock drivability with significantly increased torque capacity
• Aircraft-grade aluminum and high-carbon billet steel construction milled to .001-inch tolerance
• Dampened, full-faced carbon graphite friction discs (organic, fiber, and full-metallic options available)
• No shimming or setup required — direct bolt-in installation
• Maintenance-free operation under normal use
• Infinitely rebuildable by SPEC or the end user; replacement components always available
• Includes billet flywheel and track-spec hardware
• Includes new master cylinder and billet slave cylinder with stainless lines and fittings
• SFI Approved

Designed for street, drag, drift, road racing, time attack, pulling, and rally applications, the SPEC Super Twin is the go-to solution for builds where a single-disc clutch simply won't hold. The kit ships complete with everything needed for a direct bolt-in installation — no fabrication or custom setup required.