ACT 1989 Nissan 240SX XT/Perf Street Sprung Clutch Kit
The ACT NX1-XTSS is a street clutch with extra clamp load for the 1989 Nissan 240SX with the KA24E single-cam engine and five-speed. It is the kit to look at when a 240SX with an intake, exhaust, cam or light boost has started to slip a worn factory clutch, but the car still sees daily driving and you do not want the on-off bite of a puck disc. It combines ACT's Xtreme pressure plate with a full-face organic Performance Street disc on a sprung hub.
The Xtreme pressure plate is the stiffest diaphragm ACT offers, so it clamps the disc harder than stock and resists the deflection that lets a tired clutch slip at high rpm. The disc carries a high-copper organic lining on a steel backing, which spreads heat well and engages smoothly, and the sprung center softens takeoffs and drivetrain shock. ACT rates NX1-XTSS at 370 ft-lb at the crank, 109 percent over the factory clutch. The disc is 224 mm (8.8 in), the input shaft is 1 in, and the kit weighs 14.5 lb.
ACT describes the feel as moderate to heavy pedal effort with smooth engagement and OE to mild gear rattle. That makes it a step up from the HD street kit in holding power while keeping street manners that the six-pad race version does not have. If your car is near stock, the lighter-pedal NX1-HDSS is worth comparing; if you are making serious boost or clutch-kicking at drift events, the NX1-XTG6 six-pad race kit holds more.
Warm the car up and roll into third gear at about 2,500 rpm, then go to full throttle. If the tach climbs faster than road speed, the clutch is slipping. Before pulling the transmission, look at the clutch master and slave for leaks, check the fluid color, and make sure the pedal is coming all the way back up, since a hydraulic fault can feel like a bad clutch. Our slipping diagnosis guide walks through the road test, and the manual repair cost guide helps you budget labor for the job.
Our listing is for the 1989 Nissan 240SX. ACT's own application list for NX1-XTSS also covers the 1990 240SX KA24E, the 1995-1998 240SX with the KA24DE, the 1975-1983 280Z and 280ZX, the 1990 Axxess 2WD, the 1981-1984 Maxima 2.4L and 2.8L diesel, and 620 and 720 pickups from 1975 through 1986. ACT does not list the 1991-1994 240SX for this kit; those cars take the NX4 series, such as the NX4-XTSS. Engine swaps (SR20DET, RB, VQ) need a different kit entirely. If your car has had the engine or transmission changed, send us the year, VIN and what is in it, and we will confirm. More clutch parts are on our rebuild kits page.
| Brand | ACT |
| Part number | NX1-XTSS |
| Fits | ACT 1989 Nissan 240SX XT/Perf Street Sprung Clutch Kit |
| Vehicle fitment | Nissan 240Sx Xt/Perf (1989) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. ACT lists this kit for the 1989-1990 KA24E cars and the 1995-1998 KA24DE cars. The 1991-1994 240SX uses ACT's NX4 series, such as NX4-XTSS.
ACT rates NX1-XTSS at 370 ft-lb at the crank, 109 percent more than the factory clutch. For more than that, ACT's six-pad race kit for the same car is rated higher.
Yes, within reason. ACT describes moderate to heavy pedal effort, smooth engagement and OE to mild gear rattle, and recommends it for street and race use. The organic disc is much friendlier in traffic than a puck disc.
Both use a sprung organic street disc. The XTSS uses ACT's Xtreme pressure plate for more clamp load and torque capacity, with a heavier pedal. The HDSS uses the Heavy Duty plate for a lighter pedal and less holding power.
N023X pressure plate, 3000407 sprung organic disc, RB016 release bearing, AT01 alignment tool and PB1012 pilot bushing. A flywheel is not included.
Bleed it with fresh brake fluid whenever the hydraulics have been opened or the fluid is old, and confirm the pedal returns fully and the release system is set to factory specification.
