ACT 17-19 Honda Civic Si HD/Race Rigid 6 Pad Clutch Kit
The ACT HC10-HDR6 is built for one kind of 10th-gen Civic Si: a 1.5L turbo car that spends real time on a road course, drag strip or autocross grid and has stopped trusting its factory clutch. It combines ACT's Heavy Duty pressure plate, a 6-pad ceramic disc with a solid (rigid) hub and an XACT Streetlite flywheel, and ACT rates the package at 464 ft-lb at the crank, 109 percent over the stock clutch. If your Si slips in the upper gears on a tuned map, or the factory disc fades after a few hot laps, this is the most track-focused 6-pad option ACT makes for the car.
A clutch only holds what its clamp load and friction material allow. ACT's H032 Heavy Duty plate in this kit uses a stiffer diaphragm to raise clamp force, and the 240 mm ceramic disc (part 6240010) carries six friction pads that tolerate far more heat than an organic face. The difference from the sprung HC10-HDG6 is the hub. A rigid disc has no damper springs, so it is lighter, it lets shifts happen faster, and nothing in the center can break under repeated hard launches. The trade is that engine pulses go straight into the gearbox: ACT lists the feel as aggressive engagement with increased gear rattle and states the kit is recommended for race use only. The included 601190 Streetlite flywheel is mandatory with this plate.
Before buying any clutch, prove it is slipping. In 4th gear around 2,500 rpm, roll into full throttle and watch the tach: if RPM climbs without matching acceleration, the disc is slipping. Then check the hydraulics, because a slave cylinder or pedal that does not fully return leaves the clutch partly released and imitates a worn disc. Our slipping diagnosis guide covers the full process, and the clutch slipping causes page explains contamination and adjustment problems that a new clutch will not fix.
Holding power is the same 464 ft-lb whether you choose this rigid kit or the sprung HC10-HDG6. The question is how often the car sees traffic. A daily-driven Si with a tune is usually happier on the sprung 6-pad, or on the full-face organic HC10-HDSS (363 ft-lb). Choose the HC10-HDR6 when the car is trailered, mostly tracked, or launched hard enough that a damper hub is the weak point. ACT also notes a rigid design may increase input-shaft spline wear.
Our listing is for the 2017-2019 Honda Civic Si with the 1.5L turbo (L15B7) and 6-speed manual. ACT's application list for HC10-HDR6 is broader: 2017-2020 and 2022-2026 Civic Si, 2017-2021 Civic 1.5T manual, 2022-2024 Civic Sport and Sport Touring 1.5T, 2018-2020 Accord 1.5T and 2023-2026 Integra 1.5T. The disc is 24-spline with a 1.0325 in input. It does not fit the 2.0L Civic Type R. Send us your year and VIN if you want fitment confirmed before it ships.
Want a backup centering tool for the trailer? The 11-piece alignment tool kit covers multiple cars. A replacement 601190 Streetlite flywheel is also sold on its own.
| Brand | ACT |
| Part number | HC10-HDR6 |
| Fits | ACT 17-19 Honda Civic Si HD/Race Rigid 6 Pad Clutch Kit |
| Vehicle fitment | Honda Civic Si Hd/Race Rigid (2017-2019) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
It can be driven on the street, but ACT recommends it for race use only. The rigid hub adds gear rattle and engagement is abrupt, so most daily drivers are better served by the sprung HC10-HDG6 or the HC10-HDSS.
ACT's chart lists 2022-2026 Civic Si 1.5T (L15CA) along with 2017-2020 cars. Our listing title says 17-19, so send your VIN and we will confirm before shipping.
No. The kit includes ACT's 601190 XACT Streetlite flywheel, which must be used with this pressure plate, and both sets of bolts are supplied.
Same pressure plate, same flywheel, same 464 ft-lb rating. HDR6 uses a rigid 6-pad disc with no damper springs; HDG6 uses a sprung 6-pad disc that keeps rattle near stock.
ACT says race discs usually need only a few controlled hard slips to lap the surfaces, rather than the 300-500 mile break-in used for organic discs. Avoid overheating it during that process.
ACT lists this kit as light to moderate pedal effort. Its general guidance is that Heavy Duty plates add roughly 15 to 40 percent effort over stock depending on the car.
