Spec Nissan RB25/20 Stage 3+ Clutch Kit
The SPEC SN233F Stage 3+ is the clutch most turbo RB owners end up with once a Stage 2 starts slipping. It fits the push-type RB20DET and RB25DET cars, the R32 GTS-t and R33 GTS25t Skyline and RB-swapped chassis using those gearboxes, and SPEC rates it at 610 ft-lb of torque. It suits a street car with a bigger turbo, a drift car that needs clutch kicks to hold, or a weekend drag car, where you want real holding power without the on/off feel of a metallic race disc.
SPEC builds the Stage 3+ disc with a carbon semi-metallic full-faced material and pitches it on friction, life and drivability. Because the facing is a full ring instead of separate pucks, engagement is progressive and the car pulls away in traffic much like a firm street clutch, yet the carbon compound keeps working at heat that would glaze an organic or Kevlar disc. That is the main difference from the step above: the SPEC SN235 Stage 5 holds 740 ft-lb with a full-metallic disc but SPEC itself calls it not street-friendly. One step below is the SPEC SN232 Stage 2, a Kevlar street kit for lighter builds.
Start with the hydraulics. RB push-type cars use a master and slave cylinder, and old fluid or a weeping slave gives a soft pedal and incomplete release that can feel like a clutch fault, so bleed with fresh brake fluid. Then do a load test: low rpm in a high gear, full throttle, and watch the tach. If it climbs faster than road speed as boost arrives, the disc is slipping. Check for oil at the bellhousing too, since a rear main seal leak will ruin a new disc. Our slipping diagnosis guide details the test and our repair cost guide helps you budget the job.
Our listing is titled for the Nissan RB25 and RB20. SPEC's fit chart for SN233F lists the Skyline R33 GTS push type (1993-1998), the Skyline R32 GTS-t and GTR push type (1989-1994) and the R31 2.0L (1985-1989); the same chart also names SR20DET Silvia and 200SX, 300ZX and Nissan 2.4L truck applications. It is not for the pull-type RB26DETT GT-R. The R34 GT-t and RB25 Neo are not on the chart, and RB swaps use a mix of gearboxes, so match your transmission and release type, or send us the chassis code, engine and gearbox before ordering. See every option in our clutch and rebuild kit collection.
| Brand | SPEC |
| Part number | SN233F |
| Fits | Spec Nissan RB25/20 Stage 3+ Clutch Kit |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Yes. SPEC lists the R33 GTS push type 1993-1998 and the R32 GTS-T push type 1989-1994. If your car has been swapped, match the gearbox and release type rather than the chassis.
Yes. The disc is a full-faced carbon semi-metallic material, so engagement is progressive rather than grabby. Pedal and bite are firmer than stock, but it is far easier in traffic than the Stage 5 SN235.
SPEC rates the SN233F at 610 ft-lb of torque. For more, the Stage 5 SN235 is rated 740 ft-lb.
Resurface or replace the flywheel, fit a new crank pilot bearing, check the release fork and pivot, and bleed the hydraulics with fresh brake fluid.
No. The RB26DETT GT-R uses a pull-type clutch. Look at SPEC's pull-type GT-R kits such as the SN262 instead.
