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ZX4-HDSS - HD/Perf Street Sprung


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Note: Conversion Kit. Includes ACT Prolite flywheel.

was $1,195.00 Special Price $1,015.75
Availability: Out of stock


Item Description HD/Perf Street Sprung
Product Weight (lbs.) 30.3
Torque Capacity (ft/lbs.) 449
Torque Capacity Over OE 51%
Disc Material Organic
Clutch Disc Diameter (Inches) 9.4
Clutch Disc Diameter (Millimeters) 240
Input Shaft Diameter (inches) 1
Pressure Plate Type Heavy Duty
Flywheel Type Prolite
Warranty 12 Months (view details)


ZX4-HDSS kit features ACT's most popular Heavy Duty pressure plate and most popular street disc. ACT Heavy Duty pressure plates use exclusive diaphragm design to increase clamp load, reduce deflection and maximize clutch life. All diaphragms endure a four-stage, heat-treating process for unparalleled performance. ACT pressure plates have precision cover stampings to provide rigidity and consistency. ACT's Performance Street discs feature premium organic materials with high copper content for better heat transfer and steel-backed lining for greater burst strength and durability. These discs have reduced marcel for faster shift action to complement ACT pressure plates, with increased strength and reliability.

Feel Light to moderate pedal effort, smooth positive engagement, OE to mild gear rattle
Life Longer friction life, extended by ACT's exclusive diaphragm design
Quality Carefully engineered, precisely assembled, accurately balanced, with premium organic friction materials for heat tolerance and reduced fade
Recommended Use Recommended for street and race use
ACT Difference 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability

Vehicle Fitment

Fitment Info
Application Engine
2006 Mazda 6 Mazdaspeed 2.3 L4 GAS FI 2260cc | DOHC
2007 Mazda 3 Mazdaspeed 2.3 L4 GAS FI 2260cc | Turbocharged
2007 Mazda 6 Mazdaspeed 2.3 L4 GAS FI 2260cc | DOHC
2008 Mazda 3 Mazdaspeed 2.3 L4 GAS FI 2260cc | Turbocharged
2009 Mazda 3 Mazdaspeed 2.3 L4 GAS FI 2260cc | Turbocharged
2010 Mazda 3 Mazdaspeed 2.3 L4 GAS FI 2260cc | Turbocharged
2011 Mazda 3 Mazdaspeed 2.3 L4 GAS FI 2260cc | Turbocharged
2012 Mazda 3 Mazdaspeed 2.3 L4 GAS FI 2260cc | Turbocharged
2013 Mazda 3 Mazdaspeed 2.3 L4 GAS FI 2260cc | Turbocharged

Frequently Asked Questions

Are ACT clutches balanced?
Yes! All ACT clutch assemblies are computer spin balanced to within .25 oz-in to guarantee help smooth operation across the entire RPM range. For comparison, stock production clutches are typically balanced to within .50 oz-in. Lower is definitely better!
Will an ACT clutch increase pedal effort?
ACT pressure plates are specifically designed to handle high torque applications. With ACT's durable design, expect an increase in pedal effort between 15-40% (Heavy Duty) and 50-80% (Xtreme), depending on the application. Clutches developed with less pedal effort often result in a lack of longevity, torque capacity and/or engagement quality.
Do ACT clutches require a break in period?
For organic street discs, we recommend breaking in the clutch for 300-500 miles with mild engagement, such as stop-and-go city driving prior to racing or spirited driving. ACT race discs usually only require a few hard slips to lap in the surfaces prior to normal driving or racing. Do not overheat the clutch during the break in period, as this can result in friction surfaces fusing together, hot spots, and friction surface glazing.
Are ACT clutches repairable or rebuildable?
In some situations, rebuilds or repairs may be possible (see warranty), after inspection of the clutch assembly. Please contact our technical department for further information. Because of special modifications, we do not recommend servicing by a general clutch rebuilder.
How much does an ACT clutch weigh?
The weight of the ACT clutch assembly will usually be the same as a stock OEM clutch assembly.

United States

Modern Automotive Performance

9800 Hemingway Ave S
Cottage Grove, MN 55016

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In Stock

Options Auto Salon

985 N Todd Avenue
Azusa, CA 91702

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Not in Stock

Summit Racing Equipment

PO Box 909
Tallmadge, OH 44278

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Not in Stock