The MZ031 is an ACT Heavy Duty pressure plate for the turbocharged 2.3L Mazdaspeed3 and Mazdaspeed6, built with ACT's exclusive diaphragm design to increase clamp load and reduce deflection, and precision cover stampings for rigidity and consistency. Each diaphragm undergoes a four-stage heat-treating process. The Heavy Duty design increases clamp load by 20 to 50 percent over stock and is recommended for use with a street or race disc. This pressure plate is intended for use with an ACT flywheel.
Warranty | Installation Instructions
Specifications
- Pressure Plate: ACT Heavy Duty (four-stage heat-treated diaphragm design, precision cover stampings)
- Disc: Sold as pressure plate only; pair with an ACT flywheel and street or race disc
- Clamp Load Increase: 20-50% over stock
- Balance: Computer spin balanced to within .25 oz-in
- Warranty: 12-Month ACT "Excellence in Performance" Limited Warranty
- Part Number: ACTMZ031
Vehicle Applications
Confirmed fitment, listed by individual model year:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2007 | Mazda | 3 | Mazdaspeed |
| 2008 | Mazda | 3 | Mazdaspeed |
| 2009 | Mazda | 3 | Mazdaspeed |
| 2010 | Mazda | 3 | Mazdaspeed |
| 2011 | Mazda | 3 | Mazdaspeed |
| 2012 | Mazda | 3 | Mazdaspeed |
| 2013 | Mazda | 3 | Mazdaspeed |
| 2006 | Mazda | 6 | Mazdaspeed |
| 2007 | Mazda | 6 | Mazdaspeed |
California Prop 65 Warning: This product can expose you to chemicals including carbon black, glass wool fibers, and silica (in clutch discs), chromium and nickel, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
Frequently Asked Questions
Are ACT clutch kits balanced?
Yes. Every ACT clutch assembly is computer spin-balanced to within .25 oz-in, tighter than the .50 oz-in typical of stock production clutches, for smoother operation across the RPM range.
Will this clutch increase pedal effort?
ACT pressure plates are engineered for higher torque capacity, so pedal effort typically increases 15-40% with a Heavy Duty pressure plate and 50-80% with an Xtreme pressure plate compared to stock, depending on the application.
Does this clutch need a break-in period?
Organic street discs should be broken in for 300-500 miles of mild, stop-and-go driving before spirited use. Race discs generally only need a few hard slips to lap the surfaces before normal use. Avoid overheating the clutch during break-in, as this can glaze the friction surfaces.
Is this clutch kit repairable or rebuildable?
In some cases a rebuild or repair may be possible after inspection; contact ACT's technical department for guidance, and use a qualified clutch specialist due to the kit's specialized components.
