Spec Clutch ST66ST Super Twin Multiplate Clutch Kit - Street & Track

The Spec Clutch ST66ST Super Twin Multiplate Clutch Kit is engineered for high-performance street and track applications where extreme power demands require a clutch solution that doesn't compromise drivability. Designed to handle 700–1,500 ft-lbs of torque, the Super Twin delivers near-stock pedal feel and engagement smoothness while supporting the full spectrum of performance driving disciplines.

Key Features:

• Extreme Torque Capacity: Rated for 700–1,500 ft-lbs of torque, making it suitable for heavily modified, turbocharged, supercharged, and high-displacement builds
• Near-Stock Drivability: Smooth, quiet operation with a pedal feel comparable to OEM clutches despite massive performance gains
• Bolt-In Installation: No shimming or setup required — a true drop-in fitment for straightforward installation
• Aircraft-Grade Aluminum & High-Carbon Billet Steel: All-billet construction milled to an industry-leading .001-inch tolerance for perfect balance and actuation precision
• Dampened Carbon Graphite Friction Discs: Full-faced carbon graphite discs provide consistent, reliable friction with reduced chatter
• Multiple Friction Material Options: Available in organic, fiber, and full metallic friction disc configurations to suit your specific driving application
• Rebuildable Design: Units can be rebuilt by SPEC or by the end user; replacement components and rebuild services are always available
• Maintenance Free Operation: Long service life with no ongoing maintenance requirements
• Kit Includes: Flywheel and track-spec hardware included with every kit
• Versatile Application: Suitable for street, drag racing, drifting, road racing, time attack, pulling, and rallye use

The SPEC Super Twin is the ideal clutch upgrade for serious performance enthusiasts and competitors who demand reliability, precision, and longevity from a high-torque twin-disc clutch system. Its robust all-billet construction and industry-standard tolerances make it a benchmark in the performance clutch segment.