ACT HD/Race Rigid 6 Pad Clutch Kit
ACT NS3-HDR6 is the race-only, rigid-hub version of ACT's Heavy Duty clutch for rear-drive Japanese-market Nissan Skylines: the 1989-1992 R32 GTS-T with the 2.0L RB20DET and the 1993-1998 R33 GTS-25T with the 2.5L RB25DET, both with the five-speed. Owners shop for it when a turbo upgrade or a drift, drag or time-attack schedule has turned the clutch into the weak link, and the car is no longer expected to be pleasant in stop-and-go traffic.
Inside the kit is the N013 Heavy Duty pressure plate, the 6240006 six-pad rigid race disc and an AT01 alignment tool. ACT rates the package at 525 ft-lb measured at the crank, which it lists as 86 percent more than the factory clutch, with a 240 mm (9.4 in) disc and a 1 in input shaft. The diaphragm in the N013 is heat treated in four stages to raise clamp load and keep the fingers from deflecting, so clamp force stays consistent as the disc wears.
The difference from the sprung NS3-HDG6 is the hub. A rigid disc has no torsional springs, which makes it lighter, quicker to shift and immune to broken hub springs from repeated clutch kicks. The cost is that every pulse of the six-cylinder goes straight into the gearbox. ACT describes the feel as light to moderate pedal effort, aggressive engagement and increased gear rattle, notes that the rigid design may increase spline wear and recommends it for race use only. ACT also says its six-pad rigid disc is recommended for larger clutch sizes because it absorbs more heat.
Slip on a modified RB can come from more than the disc. Check that the clutch hydraulics are full and bled, that the slave cylinder holds pressure and that oil from the rear main seal is not reaching the friction face. Then do a high-gear pull on boost and watch whether rpm climbs ahead of road speed. Our slipping diagnosis guide covers the road test, and shift flare vs slip explains how to tell a real slip from a tuning or traction issue. If the car still sees street miles, the NS3-HDG6 sprung version keeps the same torque rating with a gentler hub, and the NS3-HDSS street kit uses a full-face organic disc for a car that is driven daily.
ACT lists NS3-HDR6 for the 1989-1992 Nissan Skyline GTS-T (R32, RB20DET) and the 1993-1998 Skyline GTS-25T (R33, RB25DET), rear-wheel drive with the five-speed manual. These are Japanese-market cars, so it is not a listed fit for the all-wheel-drive GT-R with the RB26DETT, or for the all-wheel-drive GTS-4. Imported cars and RB swaps vary, and some have had gearboxes or flywheels changed, so match the disc size and input spline against what is in the car, or send us the chassis code and engine before you order. The kit weighs 17.0 lb.
Planning the whole driveline? Our manual transmission repair cost guide outlines typical labor for a clutch job.
| Brand | ACT |
| Part number | NS3-HDR6 |
| Fits | ACT HD/Race Rigid 6 Pad Clutch Kit |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
ACT lists the 1989-1992 R32 Skyline GTS-T with the RB20DET and the 1993-1998 R33 Skyline GTS-25T with the RB25DET, rear-wheel drive with the five-speed manual. These are JDM cars.
No. The GT-R uses the RB26DETT and a different clutch, so it is not listed for this kit.
ACT rates NS3-HDR6 at 525 ft-lb at the crank, 86 percent over the factory clutch.
ACT recommends it for race use only. Expect aggressive engagement and more gear rattle. For a car with street miles, the sprung NS3-HDG6 or the NS3-HDSS street kit is a better match.
The N013 Heavy Duty pressure plate, the 6240006 six-pad rigid race disc and an AT01 alignment tool. Bearings and the flywheel are separate.
ACT says its race discs usually need only a few hard slips to lap in the surfaces. Avoid overheating the clutch during that period.
