For R33 GTR owners building a no-compromise track weapon, the Action Clutch Ironman Sprung (Street) Kit delivers the unflinching bite required to harness serious RB26DETT power. Engineered for the factory pull-type transmission, this package marries an American-sourced sintered-iron friction disc to a dual-clamp-load pressure plate, giving your drivetrain a colossal 250 percent increase in torque-holding capacity over stock. Engagement is immediate and assertive—an on/off feel that translates throttle inputs into instantaneous forward motion—yet the sprung hub damps shock to protect gears and axles during hard launches. Light gear rattle or engagement noise is normal with a competition clutch of this calibre, but chatter is virtually absent once the kit is bedded in.
Every Ironman assembly is hand-inspected and signed off by Action Clutch engineers who collectively boast more than sixty years of motorsport experience. Patented fully enclosed spring retainers keep damper springs locked in place, preventing the catastrophic failures that can occur when lesser clutches shed components at high RPM. That attention to detail gives racers the confidence to push deep into the rev range lap after lap.
Because this clutch is purpose-built for circuit, drift, and drag use, Terra Firma Automotive recommends it only for dedicated race cars or extreme weekend builds—not daily drivers. Pair it with forged internals, larger turbos, and sticky slicks, and you’ll have a drivetrain that laughs in the face of four-figure power targets while staying remarkably consistent from green flag to checkered. When split-second engagement and bulletproof durability matter more than road manners, the Ironman Sprung Kit stands ready to put every ounce of RB26 torque to the pavement.
- Sprung American Sintered Iron Disc
- Dual Clamp Load HD Pressure Plate
- Pilot Bearing / Bushing (when applicable)
- Clutch Alignment Tool
Break-in Requirements
500 street miles / Keep RPM’s under 4500, no more than half-throttle, no boost (if applicable).
Proper break-in is required in order to retain product warranty, ensure longevity and holding capacity.
*Increase in holding capacity is rated in Crank Torque, not Wheel Torque
SFI Spec 1.1 Replacement Flywheels and Clutch Assemblies
California Residents: Prop 65 WARNING: This product MAY contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov
Questions & Answers
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