Spec Clutch SD80ET Super Twin E-Trim Multiplate Clutch Kit

The SPEC SD80ET Super Twin E-Trim Multiplate Clutch Kit is a heavy-duty twin-disc clutch and flywheel assembly engineered for high-output street and track applications. Designed to handle extreme power levels between 700 and 1,500 ft-lbs of torque, the Super Twin delivers race-grade holding power while maintaining near-stock drivability for daily or street use.

Built entirely from premium billet materials, the Super Twin features an aircraft-grade aluminum and high-carbon billet steel construction machined to an industry-leading .001-inch tolerance for perfect rotational balance and precise actuation. The result is a clutch assembly that is notably smooth and quiet — a rarity at this performance level.

The E-Trim configuration uses sintered iron, full-face discs with an unsprung hub, providing aggressive friction characteristics suited for high-demand driving scenarios including drag racing, drifting, road racing, time attack, rally, and pulling events.

Key Features:

• Torque capacity: 700–1,500 ft-lbs — suitable for extreme horsepower builds
• Aircraft-grade aluminum and high-carbon billet steel construction
• Machined to .001-inch tolerances for perfect balance and actuation
• Dampened, full-faced carbon graphite friction discs as standard; organic, fiber, and full-metallic options also available
• No shimming or setup required — true bolt-in installation
• Maintenance-free operation under normal use conditions
• Rebuildable by SPEC or the end user; replacement components always available
• Flywheel and track-spec hardware included in each kit
• SFI approved
• Designed, hand-built, and tested in the USA

Ideal driving environments include street, drag racing, drifting, road racing, time attack, pulling, and rally. The Super Twin's rebuildable design and readily available replacement components make it a long-term investment for serious performance builds.