Spec Clutch ST85SST Super Twin SS-Trim Multi-Plate Clutch Kit

The SPEC ST85SST Super Twin SS-Trim Multi-Plate Clutch Kit is engineered for high-output street and track applications demanding extreme torque capacity. Rated to handle 700–1,500 lb-ft of torque, this twin-disc assembly delivers the holding power required for high-horsepower builds without sacrificing day-to-day drivability.

Built from aircraft-grade aluminum and high-carbon billet steel, every component is precision-machined to an industry-leading .001-inch tolerance for perfect rotational balance and crisp, consistent actuation. The all-billet construction keeps the unit smooth and quiet in both street and competition environments.

Friction is provided by dampened, full-faced carbon graphite discs in the SS-Trim configuration, offering an excellent balance of grip, heat resistance, and pedal feel. Organic, fiber, and full-metallic disc options are also available for different driving demands.

Key Features:

• Torque capacity: 700–1,500 lb-ft — suitable for extreme horsepower applications
• SS-Trim: Dampened, full-faced carbon graphite friction discs
• Aircraft-grade aluminum and high-carbon billet steel construction
• Precision-machined to .001-inch tolerance for perfect balance and actuation
• Near-stock pedal feel and drivability
• No shimming or setup required — true bolt-in installation
• Maintenance-free operation under normal use
• Rebuildable by SPEC or the end user; replacement components always available
• SFI approved kit construction
• Flywheel and track-spec hardware included

Supported Driving Applications: Street, drag racing, drifting, road racing, time attack, pulling, and rallye.

The SPEC Super Twin line is designed for serious performance builds that demand race-proven reliability with real-world usability. All kits are rebuildable, ensuring long-term serviceability and value.