ACT 17-21 / 23-24 Honda Civic Type R / Acura Integra Type S HD/Perf Street Sprung Clutch Kit
The K20C turbo in the Civic Type R makes enough torque from the factory that a tune, intake and downpipe can push the stock clutch past its limit. If your FK8 or FL5 Type R, or an Integra Type S, now slips in third gear under boost or flares on fast upshifts, ACT HC12-HDSS is a street-focused upgrade: ACT's Heavy Duty pressure plate, a sprung Performance Street organic disc, and an ACT Streetlite flywheel in one kit.
ACT rates HC12-HDSS at 412 ft-lb of torque capacity, 33 percent over the original clutch. The extra holding comes from the pressure plate: ACT's Heavy Duty diaphragm is designed to raise clamp load and reduce deflection, and every diaphragm goes through a four-stage heat treat. The disc is a 240 mm (9.4 inch) sprung organic unit with high copper content for heat transfer and a steel-backed lining for burst strength. Keeping the damper springs and organic facing is why this kit still drives like a street car, with ACT describing light to moderate pedal effort and smooth, positive engagement.
The kit is built around its own flywheel. ACT states the HC12-HDSS must be used with the ACT flywheel included in the kit, and it supplies both flywheel bolts (M12-1.0 x 25 mm) and pressure plate bolts (M8-1.25 x 16 mm). The complete kit weighs 31.2 lb. ACT notes gear rattle may run from OE level to mild.
Make a full-throttle pull in fourth from about 2,500 rpm and watch for rpm climbing faster than road speed. Check clutch fluid level and condition first, and rule out a dragging or soft pedal from air in the hydraulics. Our slipping diagnosis guide covers the basic checks, and the clutch slipping causes guide explains oil contamination and worn release parts that can fool you.
Our listing title covers the 2017-2021 Honda Civic Type R (FK8) plus the newer FL5 Type R and Integra Type S. ACT's own application list for HC12-HDSS reads 2017-2021 Civic Type R 2.0L turbo, 2023-2026 Civic Type R 2.0L turbo, and 2024-2026 Acura Integra Type S 2.0L turbo. Note that the Integra Type S starts with the 2024 model year in ACT's chart, not 2023. This kit is not for the regular Civic Si or the 1.5L turbo Civic. Confirm your model before ordering, or send us your year and VIN. To compare other Type R options, see the Exedy Stage 1 organic FK8/FL5 kit or, for more power, the Clutch Masters 725 twin disc. More kits are in our clutch and rebuild kit department.
Expect pedal effort to rise somewhat over stock. ACT puts the increase for its Heavy Duty pressure plates at roughly 15-40 percent depending on the application.
| Brand | ACT |
| Part number | HC12-HDSS |
| Fits | ACT 17-21 / 23-24 Honda Civic Type R / Acura Integra Type S HD/Perf Street Sprung Clutch Kit |
| Vehicle fitment | Honda Civic Type R (2017-2021) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Yes. ACT lists HC12-HDSS for the 2017-2021 FK8 Civic Type R and the 2023-2026 Civic Type R, both 2.0L turbo. It also lists the 2024-2026 Acura Integra Type S.
No. ACT states this kit must be used with the ACT flywheel that is included, and it supplies the flywheel and pressure plate bolts. Plan the install around the new flywheel.
ACT rates HC12-HDSS at 412 ft-lb of torque capacity, 33 percent above the factory clutch. That suits tuned street cars with bolt-ons. For big turbo builds, a twin disc is the safer step.
It will be firmer than stock. ACT estimates a 15-40 percent increase in pedal effort for its Heavy Duty pressure plates, depending on the car, and describes this kit as light to moderate effort with smooth engagement.
Yes. ACT recommends 300-500 miles of mild stop-and-go driving for organic street discs before launches or track use, and warns not to overheat the clutch during break-in.
