Dominate the grid with Action Clutch’s Ironman Unsprung Clutch Kit for the Nissan Skyline R33 GTR RB26DETT. Purpose-built for pull-type gearboxes and four-figure power targets, this competition clutch pairs a dual-clamp, heavy-duty pressure plate with an American sintered-iron friction disc in a rigid (unsprung) hub. The result is a brutally direct, on/off engagement that translates every ounce of RB26 torque straight to the driveline—ideal for drag launches, drift transitions, and flat-out circuit exits. With more than 250 percent greater holding capacity than the factory unit, the Ironman Unsprung thrives where street clutches fade, shrugging off extreme heat and repeated high-RPM shifts without flinching.
Race-grade performance demands race-grade protection, so Action Clutch locks each damper spring into patented fully enclosed retainers, eliminating the risk of spring ejection that can grenade engines and transmissions under load. Every assembly is blue-printed and signed off by engineers wielding six decades of motorsport experience, ensuring rock-solid consistency from the first burnout to the last lap. Expect a touch of gear rattle and engagement noise—hallmarks of an unsprung race unit—but zero clutch chatter once broken in.
Because this clutch is engineered exclusively for track use, Terra Firma Automotive recommends it for dedicated race builds, not daily drivers. Match it with forged internals, big turbos, and sticky tires, and the Ironman Unsprung Kit will deliver uncompromising power transfer and durability, giving your R33 GTR the edge it needs to chase podiums with confidence.
- Unsprung 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.
Disclaimers
Using a clutch kit with an unsprung clutch disc on a stock or lightly modified power engine that is daily/street driven vehicle can break the rivets on the clutch disc hub. Unsprung clutch kits are not designed for daily/street use or any constant on/off engagement environment. This can be compared to running a marathon in sandals vs a proper running shoe. If you were to run the marathon ins sandals, you have no cushion or comfort and can cause injuries or wear you down faster than using proper running shoes.
*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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