Spec Clutch SF05ST Super Twin Multi-Disc Clutch Kit ST-Trim Carbon Composite

The Spec Clutch SF05ST Super Twin is a high-performance multi-disc clutch kit engineered for street and track use in high-output vehicles with extreme power demands. Designed to handle 700–1,500 ft-lbs of torque, the Super Twin delivers the performance needed for drag racing, road racing, time attack, drift, pulling, and rallye—while still maintaining near-stock drivability on the street.

Built from aircraft-grade aluminum and high-carbon billet steel, every component is precision-machined to an industry-leading .001-inch tolerance for optimal rotational balance and smooth, consistent actuation. The ST-Trim configuration features dampened, full-faced carbon composite friction discs that deliver excellent torque capacity and durability across a wide range of driving conditions.

Key Features:

• Rated for 700–1,500 ft-lbs of torque — suitable for extreme street and competition builds
• ST-Trim: dampened, full-faced carbon composite friction discs
• Aircraft-grade aluminum and high-carbon billet steel construction
• Precision-machined to .001-inch tolerance for perfect balance and actuation
• Near-stock drivability with smooth, quiet operation
• No shimming or setup required — true bolt-in installation
• Maintenance-free design under normal operating conditions
• Fully rebuildable by SPEC or the end user
• Replacement components and rebuild services always available
• Flywheel and track-spec hardware included
• Suitable for: street, drag, drift, road racing, time attack, pulling, and rallye

Additional friction disc options — including organic and full-metallic — are available for builds with different performance priorities. The Super Twin's all-billet construction ensures long service life and consistent performance whether the vehicle sees daily street use or regular track duty.