Clutch Masters 02-06 Acura RSX 2.0L Type-S 6 Sp (High Rev) / 02-06 Honda Civic SI 2.0L& 6 Sp (High R
This is the Clutch Masters FX300 clutch kit, part 08037-HRTZ, for the K20-powered Acura RSX Type-S and Honda Civic Si with the six-speed manual. It is the kit K20 owners reach for when the stock clutch starts slipping near redline after a header, intake, cams or a mild boost setup, but they still want a sprung disc that is easy to live with in traffic. It is a single-disc kit with no flywheel included.
The Type-S RSX and the later Civic Si both make their power high in the rev range, and the clutch has to hold that power on fast upshifts. A stock disc that has worn thin, or one facing more torque than it was built for, lets go first at the top of second and third gear. The FX300 uses Clutch Masters' Power Plus I heavy-duty pressure plate with a steel-backed segmented Kevlar disc. The segmented layout puts more clamp pressure on each square inch of facing, which is how Clutch Masters reaches its rated 110 percent increase in holding capacity.
A heavy-duty sprung hub and a Marcel spring wafer stay in the disc, so takeoffs remain smooth. Clutch Masters lists a slight increase in pedal effort, long life and positive engagement, and notes that the Kevlar facing does not score the flywheel. It is intended for a highly tuned naturally aspirated K20, a medium-boost turbo or supercharger, or up to 100 hp of nitrous, and is recommended for street use rather than the track.
Do a fourth-gear, full-throttle pull from about 2,500 rpm and watch the tach. A slipping clutch lets rpm climb without a matching gain in speed. Separate disc wear from hydraulic trouble by checking the clutch fluid and the slave cylinder for leaks, and look for oil at the bellhousing that would point to the rear main seal. Grinding with a good disc often traces to the hydraulics or worn synchros rather than the clutch. Our slipping diagnosis guide covers the test, and the rebuild vs replace guide helps if the gearbox itself is suspect.
Clutch Masters' application list for 08037-HRTZ is the 2002-2006 Acura RSX 2.0L Type-S six-speed, the 2006-2011 Honda Civic Si 2.0L six-speed and the 2006-2011 Acura CSX Type-S six-speed. Our listing title reads 02-06 for the Civic Si, but the Civic Si on the maker's list is the 2006-2011 six-speed car; the 2002-2005 Civic Si is not on it. The base RSX five-speed is not on the maker's list for this part number. Clutch Masters also builds this application as 08037-HRC6 and 08037-HR00, both listed in our shop, if you want a stronger or milder option. Send us the year and VIN and we will confirm before it ships.
If you want more grip for a boosted build, the Competition Clutch Stage 4 kit is a ceramic alternative, and our manual transmission repair cost guide helps you budget the labor.
| Brand | Clutch Masters |
| Part number | 08037-HRTZ |
| Fits | Clutch Masters 02-06 Acura RSX 2.0L Type-S 6 Sp (High Rev) / 02-06 Honda Civic SI 2.0L& 6 Sp (High R |
| Vehicle fitment | Acura Rsx (2002-2006) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Clutch Masters lists 08037-HRTZ for the 2006-2011 Civic Si 2.0L six-speed, not the 2002-2005 Civic Si. Send us your VIN and we will confirm what fits.
Clutch Masters lists this part number only for the 2002-2006 RSX Type-S 2.0L six-speed. The five-speed base car is not on that list, so check with us before ordering.
No flywheel is included. Resurface the factory flywheel if it is within spec, or replace it if it is heat-cracked or below minimum thickness.
Clutch Masters recommends the FX300 for the street, not track use. For track days or higher boost, look at the 6-puck kits.
Bleed the clutch hydraulics with DOT 3 brake fluid and use Honda MTF in the gearbox.
Yes. Clutch Masters requires a minimum 500-mile break-in before hard launches or full-throttle shifts.
