Spec Clutch SFG5ET-3 Super Twin E-Trim Multi-Disc Clutch Kit with Flywheel

The SPEC SFG5ET-3 Super Twin E-Trim Multi-Disc Clutch Kit is engineered for high-output street and track applications demanding extreme torque capacity. Rated to handle 700–1,525 ft-lbs of torque at the flywheel, this twin-disc clutch system delivers the holding power required for heavily modified performance builds while maintaining near-stock drivability. Suitable driving applications include street, drag, drift, road racing, time attack, pulling, and rallye.

The E-Trim is SPEC's most aggressive Super Twin configuration, utilizing two sintered iron friction discs — the same high-friction material used in the Stage 5 single-disc kit — for maximum torque capacity and aggressive engagement. The dampened, full-faced disc design contributes to smooth, progressive clutch feel despite the extreme performance capability.

Key Features:

• 1,525 ft-lbs flywheel torque capacity — ideal for builds in the 700–1,500 ft-lbs range
• Twin sintered iron discs for maximum friction coefficient and torque capacity
• All-billet construction — aircraft-grade aluminum and high-carbon billet steel milled to industry-leading .001-inch tolerances for perfect balance and smooth, quiet operation
• No shimming or setup required — direct bolt-in installation with no fabrication needed
• Fully rebuildable by SPEC or the end user; replacement components and rebuild services are always available
• SFI approved for racing safety and compliance
• Includes flywheel and track-spec hardware — everything needed for a complete installation
• Maintenance-free operation with exceptional service life
• 26-spline disc hub for compatibility with race-built or aftermarket transmissions

The SPEC Super Twin uses a 240mm friction surface across the twin-disc assembly. Unlike single-disc clutches that require heavier pressure plate loads to increase capacity, the twin-disc layout increases torque capacity through added surface area — resulting in greater holding power and more progressive, streetable engagement. The billet pressure plate ensures optimal machine tolerances, rotational integrity, and consistent actuation throughout the life of the unit.