ACT 2013 Scion FR-S HD/Race Rigid 6 Pad Clutch Kit
ACT SB8-HDR6 is for the 2013 Scion FR-S that lives at the track or the drag strip: a Heavy Duty pressure plate, a solid-hub 6-pad ceramic disc and a Prolite flywheel in one box. Buyers usually land here after a forced-induction FA20 has overpowered the factory clutch, or after a time-attack or drift car has cooked a sprung disc. It is not a comfort upgrade. It is the version of ACT's FR-S kit built for the fastest shifts and the most heat.
The SB024 Heavy Duty plate raises clamp load over stock, and the 6228018 disc uses six ceramic pads on a heat-treated chrome-moly hub with no damper springs. Without springs, nothing in the disc soaks up torque spikes, so engagement is abrupt and the gearbox sees every pulse from the engine, but the lighter disc lets the input shaft slow down faster for quick upshifts. ACT rates SB8-HDR6 at 394 ft-lb at the crank, 142 percent over the original clutch, with an 8.8-inch (224 mm) disc on a 1-inch input shaft. The kit weighs about 23.9 pounds.
The included 600475 Prolite flywheel is mandatory. ACT calls this a conversion kit and states the ACT flywheel must be used, so the factory flywheel comes out for good. Flywheel bolts (M10-1.0 x 25 mm) and pressure plate bolts (M8-1.25 x 16 mm) are supplied.
ACT is blunt about the downside: light to moderate pedal effort, aggressive engagement, increased gear rattle, possible extra spline wear, and a race-only recommendation. If the FR-S is also your commuter, the sprung-hub SB8-HDG6 uses the same plate and flywheel with a damped disc, and the SB8-HDSS street kit is smoother still.
Make sure the problem is the clutch. Air in the hydraulic line or a weak slave cylinder causes drag and hard shifts, and a leaking rear main seal contaminates any disc you install. To test for slip, hold fourth gear from low rpm at full throttle and watch for the tach to rise faster than speed. Our slipping diagnosis guide covers the procedure, and our oil on the clutch disc guide explains how to spot contamination when the old clutch comes out.
We list SB8-HDR6 for the 2013 Scion FR-S. ACT's chart for this part number covers the 2013-2016 FR-S, 2013-2020 Subaru BRZ and the 2017-2020 Toyota 86 (plus JDM 86 models) with the 2.0-liter FA20 and six-speed manual. The 2022-up 2.4-liter BRZ and GR86 are not listed. ACT also sells SB7 kits with a heavier Streetlite flywheel and SB13 kits for the same cars, so check that the number on your order reads SB8-HDR6, or send us your year and VIN and we will confirm. More choices are in our rebuild kits and clutch section.
Rigid discs send extra shock through the driveline, so a high-power FR-S benefits from a DSS one-piece carbon fiber driveshaft installed at the same time.
| Brand | ACT |
| Part number | SB8-HDR6 |
| Fits | ACT 2013 Scion FR-S HD/Race Rigid 6 Pad Clutch Kit |
| Vehicle fitment | Scion Fr-S Hd/Race Rigid 6 (2013) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Both use the ACT Heavy Duty pressure plate and Prolite flywheel. SB8-HDR6 has a rigid 6-pad disc with no damper springs; SB8-HDG6 has a sprung 6-pad disc. The rigid disc shifts faster but is harsher and noisier, and ACT recommends it for race use only.
No. ACT says this conversion kit must be used with the included ACT Prolite flywheel (600475). Flywheel and pressure plate bolts come in the kit.
ACT lists the 2013-2020 Subaru BRZ and 2017-2020 Toyota 86 with the 2.0L FA20 manual, along with the 2013-2016 FR-S. The 2022-up 2.4L cars are not covered.
ACT rates SB8-HDR6 at 394 ft-lb measured at the crank, 142 percent over the factory clutch.
Damper springs in a normal disc absorb engine firing pulses at idle. A rigid disc has none, so those pulses reach the gearbox and you hear rattle, especially in neutral. ACT notes the rigid design may also increase spline wear.
