ACT Twin Disc Sint Iron Race Clutch Kit

Item SKU: T1RR-N02

ACT's T1RR-N02 is a Transmission Clutch Kit for the ACT Twin Disc Sint Iron Race Clutch Kit application. It's a race-only modular twin-disc setup built around sintered iron discs, a rigid heat-treated chromoly hub, and a CNC-machined flywheel. This is for high-horsepower race use, not street driving.

• Race friction: Two sintered iron race discs provide ACT's highest torque capacity among its race-disc materials, along with high heat capacity for repeated hard use.
• Rigid hub: The rigid Mono-Drive hub is aimed at quick shifts and quick throttle response. Expect more gear rattle than a sprung-hub clutch, and keep in mind that rigid designs can increase spline wear.
• Pedal and engagement: Pedal effort is light to moderate, with predictable, quick engagement. Most ACT twin-disc race kits run roughly 10 to 20 percent more pedal load than stock while using substantially higher clamp load.
• Hardware: The kit uses chromoly steel floaters, a forged aluminum cover with ACT's integrated nine-post design, and diaphragm springs treated through ACT's four-stage heat-treatment process. The diaphragms use hardened posts for durability under severe use.
• Included parts: Pressure plate, two clutch discs, floater, flywheel, and alignment tool are included. The flywheel is CNC machined and dynamically balanced.
• Assembly and testing: ACT heat-treats the chromoly hub, clamp-load tests each assembly, and dynamically computer balances the kit for smooth operation at high RPM. It meets SFI Specification 1.2.

For a dedicated race car, this stuff addresses the usual twin-disc priorities: heat capacity, clamp load, and repeatable engagement. It also keeps the installation straightforward as a direct bolt-in kit, with no additional modifications called for. No more trying to make a street-oriented disc live through race-level heat cycles, but the added drivetrain noise and rigid-hub wear tradeoffs are part of the deal.