ACT XT/Race Rigid 6 Pad Clutch Kit
An SR20DET with a big turbo, a built bottom end and drift or drag tires will burn through a street clutch quickly. Buyers searching for NS1-XTR6 usually have a Silvia or an SR-swapped chassis that slips on a hard clutch kick or smells hot after a session. This is ACT's most aggressive single-disc kit for the SR20DET: the Xtreme pressure plate paired with a rigid six-pad ceramic disc, intended by ACT for race use only.
The kit uses ACT's N015X Xtreme pressure plate over the 6240006 six-pad rigid race disc, a 240 mm (9.4 in) ceramic disc with a 1 in input spline and a heat-treated chrome-moly hub. ACT rates it at 565 ft-lb at the crank, 127 percent over the original clutch. The rigid hub has no damper springs, so it is lighter and lets the gearbox shift faster, but every torque spike goes straight into the transmission. ACT lists the trade-offs plainly: moderate to heavy pedal effort, aggressive engagement, increased gear rattle, and possible extra spline wear from the rigid design.
If the car sees regular street miles, the sprung NS1-XTG6 keeps the same Xtreme plate with a damped hub, and the NS1-HDR6 offers a rigid disc under the lighter Heavy Duty plate. The NS1-XTSS street disc is the most livable option of the three.
Log a pull in a high gear and compare engine rpm against wheel speed; a gap that opens as boost rises is clutch slip. Check that the clutch hydraulics hold full release and that there is no oil reaching the disc from the rear main or the transmission input seal. Our slipping diagnosis guide covers the basic checks, and the manual repair cost guide helps budget the job. Be honest about how the car is used: a rigid race disc in a car that commutes daily will chatter and rattle.
Our listing does not name a vehicle. ACT's application chart lists NS1-XTR6 for the SR20DET 2.0L turbo in the JDM 1990-1998 Nissan Bluebird SSS Attessa LTD, the 1991-1998 Silvia K (S13 and S14, RWD five-speed), and the 1999-2002 Silvia Spec-R (S15, six-speed). ACT does not list any US-market car, since the 240SX was sold here with the KA24; the KA24 cars use ACT's NX kits. In an SR20DET swap, what matters is the engine and transmission pairing, so tell us which gearbox you run and send the details before ordering. More kits are on our rebuild kits page.
| Brand | ACT |
| Part number | NS1-XTR6 |
| Fits | ACT XT/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 SR20DET 2.0L turbo in the JDM Bluebird SSS Attessa LTD 1990-1998, Silvia K S13/S14 1991-1998 and Silvia Spec-R S15 1999-2002. It is not listed for the KA24 240SX.
ACT rates it at 565 ft-lb measured at the crank, 127 percent over the original clutch.
ACT recommends it for race use only. The rigid disc engages harshly and adds gear rattle. For a car that also sees street miles, the sprung NS1-XTG6 or the NS1-XTSS is a better fit.
N015X Xtreme pressure plate, 6240006 rigid six-pad ceramic disc, RB810 release bearing, PB1012 pilot bushing and AT01 alignment tool. A flywheel is not included.
ACT notes the rigid design may increase spline wear, because there are no damper springs to absorb torque spikes. Inspect the input shaft splines at each clutch service.
