Spec Clutch SD88ET Super Twin Multi-Disc Clutch Kit ET-Trim

The Spec Clutch SD88ET is a Super Twin multi-disc clutch kit engineered for high-performance street and track applications handling extreme horsepower and torque levels from 700 to 1,500 ft-lbs. Designed and hand-built in the U.S.A., this twin-disc assembly delivers the holding power required for serious motorsport use while retaining near-stock drivability on the street.

The Super Twin platform is constructed from aircraft-grade aluminum and high-carbon billet steel, precision-machined to industry-leading .001-inch tolerances for perfect balance and smooth actuation. Friction is provided by dampened, full-faced carbon-graphite discs paired with a sprung hub design for refined engagement characteristics.

Key Features:

• Available in multiple friction trims: SS-Trim, P-Trim, ST-Trim, E-Trim, and ET-Trim to match your specific power level and driving style
• Torque capacity up to 1,500+ ft-lbs — suitable for street, drag, drift, road racing, time attack, pulling, and rallye
• All-billet construction for smooth, quiet operation
• No shimming or setup required — direct bolt-in installation
• Maintenance-free operation under normal use
• Fully rebuildable by SPEC or the end user; replacement components and rebuild services always available
• Flywheel and track-spec hardware included in the kit
• Designed, built, and tested in the U.S.A.

The SD88ET Super Twin clutch kit is ideal for builds that demand maximum drivetrain reliability under sustained high-load conditions. With a fully rebuildable design and long service life, it offers an excellent long-term value for competitive and high-horsepower street applications alike.