Clutch Masters Honda / Acura K-Series FX725 Twin-Disc Clutch Kit w/o Flywheel (Used with FW-037-TDS)
Turbo and high-boost K-series drag cars outgrow single disc clutches fast. If your RSX, Civic Si or TSX is slipping on the launch or the big-gear pull, or you are building for power that no single disc will hold reliably, the Clutch Masters 08037-TD7R-X is a 7.25 inch twin disc race clutch for the Honda and Acura K20 and K24 engines. This version is the clutch only, with no flywheel: it is meant to bolt to the matching Clutch Masters twin disc flywheel, FW-037-TDS.
The FX725 uses two 184 mm discs instead of one larger disc. More friction surfaces let it hold big torque in the small bellhousing of a front-drive transaxle, while the small diameter keeps rotating mass very low so the engine revs freely. The TD7R stage is the Race version, with two rigid ceramic discs. Clutch Masters is direct about the trade-off: the FX725 is focused on drag racing, and because of its low mass it is not ideal for the street, though it can handle occasional street driving.
The cover is machined from billet aluminum and hard anodized. Clutch Masters says it flexes about .003 inch, compared with as much as .030 inch for a cast or stamped cover, so pedal travel goes into releasing the clutch instead of bending the cover. Its QR quick release system uses three spring-loaded bolts to help the pressure plate engage and release evenly and cut internal chatter.
Do a high-gear, low-rpm full throttle test. If the tach rises faster than road speed, the clutch is slipping. Rule out hydraulic problems first: a soft or sinking pedal, incomplete release or grinding into gear point to the master, the slave or air in the line. Our slipping diagnosis guide covers the checks, and flare vs slip helps you read the symptom. If you are deciding whether a race twin is right for a car you drive daily, the clutch kit buyers guide compares street and race choices.
Clutch Masters lists 08037-TD7R-X for these K-series applications:
Because this kit has no flywheel, confirm you have or are buying FW-037-TDS. It will not bolt to a factory flywheel. On swapped chassis, send the engine, transmission and year so we can check. Want everything in one box? See the RSX 725 PRO twin with steel flywheel or the Competition Clutch 184 mm K-series twin.
| Brand | Clutch Masters |
| Part number | 08037-TD7R-X |
| Fits | Clutch Masters Honda / Acura K-Series FX725 Twin-Disc Clutch Kit w/o Flywheel (Used with FW-037-TDS) |
| Type | Clutch Kits - Multi |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. This is the clutch only. It is designed to be used with the Clutch Masters FW-037-TDS twin disc flywheel and will not bolt to a factory flywheel.
Clutch Masters lists 2002-2006 RSX, 2002-2015 Civic Si, 2004-2014 TSX, 2003-2012 Accord 2.4L, 2006-2011 CSX Type-S and 2013-2015 ILX 2.4L 6-speed.
Clutch Masters says the FX725 is focused on drag racing and is not ideal for the street, but it can handle occasional street driving. The TD7S Street and Race stage is the milder option.
TD7R is the Race stage with two rigid ceramic discs. TD7S pairs one rigid ceramic disc with one rigid Fiber Tuff disc for smoother engagement.
Clutch Masters offers the release bearing as a separate replacement part. Replace yours if it is noisy, rough or high mileage.
