Spec Clutch SC42ST Super Twin ST-Trim Multiplate Clutch Kit

The Spec Clutch SC42ST Super Twin ST-Trim Multiplate Clutch Kit is engineered for high-performance street and track applications where extreme power demands require a heavy-duty, multi-disc clutch solution. Rated to handle 700–1,500 ft-lbs of torque, the Super Twin delivers the holding power needed for forced-induction, diesel, and built race engines without sacrificing day-to-day drivability.

Unlike conventional racing clutches that trade streetability for grip, the Super Twin is designed to provide near-stock engagement feel, making it equally at home during daily driving as it is on the drag strip, road course, or drift track. Installation is straightforward with a true bolt-in fitment—no shimming or custom setup required.

Key Features:

• Torque capacity rated for 700–1,500 ft-lbs — suitable for extreme horsepower builds
• All-billet construction using aircraft-grade aluminum and high-carbon billet steel, milled to an industry-leading .001-inch tolerance for perfect balance and actuation
• Dampened, full-faced carbon graphite friction discs provide smooth, consistent clutch engagement
• Multiple friction material options available: organic, fiber, and full-metallic
• Near-stock drivability with smooth and quiet operation
• No shimming or setup required — true bolt-in installation
• Fully rebuildable by SPEC or the end user; replacement components and rebuild services are available
• Maintenance-free operation under normal use
• Flywheel and track-spec hardware included in the kit

Suitable driving applications include street, drag racing, drifting, road racing, time attack, pulling, and rallye. ST-Trim designates the carbon graphite full-face disc configuration within SPEC's Super Twin lineup. All SPEC Super Twin assemblies are designed, hand-built, and tested in the U.S.A.