ACT 2007 Mazda 3 HD/Race Sprung 6 Pad Clutch Kit
If your Mazdaspeed3 slips in third or fourth gear the moment a tune or bigger turbo brings boost in, the stock clutch has run out of clamp load. The ACT ZX5-HDG6 is a complete Heavy Duty pressure plate and 6-pad sprung ceramic race disc kit for the turbocharged 2.3L MZR DISI engine, built for owners who launch hard, run track days or have pushed well past the factory 280 lb-ft. Our listing title reads "2007 Mazda 3", but this part number is the Mazdaspeed turbo application, not the non-turbo Mazda3.
The Mazdaspeed3 is front-wheel drive with a six-speed manual and a limited-slip differential, so every bit of torque the turbo makes has to pass through one 240 mm friction disc. ACT rates this kit at 574 ft-lb at the crank, 93 percent over the original clutch. It gets there with an ACT Heavy Duty diaphragm pressure plate (MZ031) that raises clamp load, and a 6-pad ceramic puck disc (6240508-2) with a sprung center to soak up driveline shock. It is a conversion kit: it ships with the ACT XACT Streetlite flywheel 600641, so the stock flywheel comes out and is not reused.
Six ceramic pads do not engage like an organic street disc. ACT describes the feel as light to moderate pedal effort with aggressive engagement, faster shifts and OE to mild gear rattle at idle. That is the trade you make for holding big boost.
Do a high-gear pull test: in fourth at about 2,500 rpm, go to full throttle. If the tach climbs faster than the car accelerates, the disc is slipping. Before you buy, rule out a dragging hydraulic system or a pedal that never fully returns, since both can mimic slip. Our slipping diagnosis guide walks through separating clutch slip from other causes, and the Mazdaspeed3 clutch cost and upgrade guide covers labor and stage choices.
ACT lists ZX5-HDG6 for the 2007-2013 Mazdaspeed3 and the 2006-2007 Mazdaspeed6, both with the 2.3L turbo. It does not fit the regular naturally aspirated Mazda3. If you are not sure which car you have, send us the year and VIN before ordering. If your build is a street car with a moderate tune, the ZX5-HDSS street kit has the same pressure plate with a smoother full-face organic disc. Higher boost builds can step to the ZX5-XTSS Xtreme kit. Browse more in our rebuild kits.
If the pressure plate ever needs replacing on its own later, the ACT MZ031 Heavy Duty pressure plate is the same unit and is sold separately.
| Brand | ACT |
| Part number | ZX5-HDG6 |
| Fits | ACT 2007 Mazda 3 HD/Race Sprung 6 Pad Clutch Kit |
| Vehicle fitment | Mazda 3 Hd/Race Sprung 6 (2007) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. ACT lists this kit for the 2007-2013 Mazdaspeed3 and 2006-2007 Mazdaspeed6 with the 2.3L turbo engine. Non-turbo Mazda3 models use a different clutch. Send us your VIN if you are unsure.
No. This is a conversion kit and it includes the ACT XACT Streetlite flywheel 600641, which replaces the factory flywheel.
ACT rates it at 574 ft-lb measured at the crank, 93 percent over the factory clutch.
It can be driven on the street, but the 6-pad ceramic disc engages aggressively and may add mild gear rattle. If the car is mostly a commuter, the ZX5-HDSS organic street kit is the smoother choice.
ACT says race discs need only a few hard slips to lap the surfaces in. Do not overheat the clutch during that process.
Brake fluid. Use the grade printed on the reservoir cap and bleed the system after installation.
