Clutch Masters 07 MazdaSPEED6 7.25in Twin Disc (Street) Clutch Kit
A built MazdaSpeed6 with a big turbo, fuel upgrades and an aggressive tune can overpower a single-disc clutch no matter how stiff the pressure plate is. Clutch Masters 10306-TD7S-A is the FX725 Street twin disc for the 2.3 liter turbo MazdaSpeed6: two 7.25 inch (184 mm) discs, a billet aluminum cover and a billet aluminum flywheel in one matched kit. It is built for owners who launch the car at the strip and want a clutch that will not be the weak link, and who accept some street manners in return.
Instead of one large disc, the FX725 stacks two small ones with a floater between them, doubling the friction surface while keeping rotating mass low. In the TD7S Street and Race stage, one disc is a rigid ceramic and the other is a rigid Fiber Tuff organic, which gives more progressive engagement than the all-ceramic TD7R race version. The cover is machined from billet aluminum and Type 3 hard anodized. Clutch Masters says it flexes only about 0.003 in, compared with up to 0.030 in for cast or stamped covers, so pedal travel goes into releasing the clutch rather than bending the cover.
The kit uses Clutch Masters' QR quick release pressure plate, with three spring-loaded bolts that help the plate engage and release evenly and, per the maker, cut internal noise and chatter by up to 50 percent. The included flywheel is billet 6061-T6 aluminum, SFI 1.2 rated, hard anodized, with a replaceable friction insert. Shipping weight for the kit is 18 lb.
A wide-open roll-on in fourth gear will show slip as rpm climbing faster than speed. Before blaming the clutch, check the clutch master and slave cylinders and bleed the system, since a soft pedal can stop the clutch from releasing, and look for oil from the rear main seal. Our slipping diagnosis guide explains the tests, and the rebuild versus replace guide helps if the six-speed itself needs attention while it is out.
Our listing is for the 2007 MazdaSpeed6 with the 2.3 liter DISI turbo. Clutch Masters lists 10306-TD7S-A for the MazdaSpeed6 from 2005 through 2007 and for the 2007-2013 MazdaSpeed3, since both share the turbo 2.3 and the same clutch fitment. Be honest with yourself about use: Clutch Masters says the FX725 is focused on drag racing and is not ideal for the street, though improved friction material makes occasional street driving workable. Rigid discs with no hub springs pass more vibration to the driveline than a sprung single disc. If you want a calmer daily setup, a sprung single-disc kit from our rebuild kits department is the better fit. For an engine or gearbox swap, send us the year and VIN before ordering.
The MazdaSpeed6 is AWD, so more clutch also means more load on the axles; the DSS 500 hp rear axle is worth a look on a high-power build.
| Brand | Clutch Masters |
| Part number | 10306-TD7S-A |
| Fits | Clutch Masters 07 MazdaSPEED6 7.25in Twin Disc (Street) Clutch Kit |
| Type | Clutch Kits - Multi |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Yes. Clutch Masters lists the same part number for the 2007-2013 MazdaSpeed3 and the 2005-2007 MazdaSpeed6, both with the 2.3 liter turbo.
Yes. The A suffix kit includes a billet 6061-T6 aluminum flywheel, SFI 1.2 rated, with a replaceable insert.
It can be driven on the street occasionally, but Clutch Masters says the FX725 is focused on drag racing and is not ideal for the street. Expect more engagement bite and driveline vibration than a sprung single disc.
TD7S, this kit, uses one rigid ceramic disc and one rigid Fiber Tuff disc. TD7R uses two rigid ceramic discs and is aimed at full race use.
Clutch Masters requires at least 500 miles of normal stop-and-go driving with no full-throttle shifting or compression braking.
Clutch Masters says its billet covers flex about 0.003 in versus up to 0.030 in for cast or stamped covers, giving more consistent release and more clamp force.
