ACT 2013 Scion FR-S XT/Perf Street Sprung Clutch Kit
ACT SB8-XTSS is aimed at the FR-S, BRZ or Toyota 86 owner who has added real power and also wants the FA20 to rev more freely. A forced-induction FA20 will overwhelm the factory clutch quickly, and the symptom is familiar: the tach jumps when boost arrives in a higher gear while the car barely pulls. SB8-XTSS answers that with ACT's Xtreme pressure plate and organic street disc, and swaps the heavy factory flywheel for ACT's 8.4 lb Prolite.
ACT lists this kit at 366 ft-lb of torque capacity at the crank, 125 percent over the original clutch. The extra holding power comes from the Xtreme diaphragm spring, which ACT designs for higher clamp load and less deflection. The friction side is an 8.8 in (224 mm) Performance Street organic disc with a sprung center and a 1 in input spline, built with a high-copper, steel-backed lining so it engages smoothly in daily use and resists heat better than a basic organic facing.
The flywheel is what sets SB8 apart. ACT's 600895 Prolite is chromoly steel, 8.4 lb, with 124 ring-gear teeth, and ACT's kit list pairs it with the SB023 pressure plate, 3000507 sprung disc, RB004 release bearing, PB1004 pilot bearing and AT90 alignment tool. The kit is a conversion, ACT says its flywheel must be used, and flywheel bolts (M10-1.0 x 25 mm) plus pressure plate bolts (M8-1.25 x 16 mm) are included. ACT's separate page for SB023 is titled Heavy Duty while the kit specification names an Xtreme plate, so compare the box labels with this list when it arrives and contact us with any mismatch.
A lighter flywheel lets the engine gain and drop rpm faster, which helps rev-matched downshifts and track response. The cost is a car that needs a little more throttle to pull away cleanly, more care at very low speed, and possibly more gear rattle at idle. The pedal is also firmer: ACT calls it moderate to heavy and says Xtreme plates add roughly 50 to 80 percent pedal effort.
Make sure the problem is the clutch. A pedal that sinks or gears that grind usually mean air in the hydraulics or a weak slave or master cylinder. To test for slip, pull from low rpm in a tall gear at full throttle and watch for engine speed racing ahead of road speed. Our slipping diagnosis walkthrough covers the method, and the manual vs. automatic repair cost guide helps you budget the job. Check the bellhousing for oil, since a leaking rear main seal will ruin a new disc.
We list SB8-XTSS for the 2013 Scion FR-S. ACT's chart extends to the 2013-2016 FR-S, 2013-2020 Subaru BRZ and 2017-2020 Toyota 86, including the JDM 86, all 1998 cc FA20 engines with the manual gearbox. The 2.4L second-generation BRZ and GR86 are not covered. Because ACT's FR-S part numbers differ by a single character, confirm the box reads SB8-XTSS, or send us your year and VIN to verify. Browse more clutch parts in our rebuild kits section.
If you would rather keep a heavier flywheel for easier street manners, the SB7-XTSS Streetlite kit has the same rating. For a car with modest power, the SB8-HDSS Heavy Duty kit gives a lighter pedal.
| Brand | ACT |
| Part number | SB8-XTSS |
| Fits | ACT 2013 Scion FR-S XT/Perf Street Sprung Clutch Kit |
| Vehicle fitment | Scion Fr-S Xt/Perf (2013) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
ACT lists the 2013-2016 Scion FR-S, 2013-2020 Subaru BRZ and 2017-2020 Toyota 86 with the 2.0L FA20 and manual transmission. It is not listed for the 2022-up 2.4L cars.
The 600895 Prolite in this kit is chromoly steel and ACT lists it at 8.4 lb with 124 teeth. The SB7-XTSS kit uses the 12.9 lb Streetlite instead.
No. ACT calls this a conversion kit and says the included ACT flywheel must be used. Flywheel and pressure plate bolts come in the kit.
It can be driven daily, but expect a firmer pedal (ACT says 50 to 80 percent more effort with Xtreme plates) and a lighter flywheel that needs more care pulling away. It makes the most sense on a boosted or track car.
The kit already includes the pilot and release bearings. Inspect the slave cylinder and rear main seal while the transmission is out, and bleed the hydraulics with fresh brake fluid.
