SKU: ZX4-HDSS | UPC: 842385014339
ACT ZX4-HDSS HD/Performance Street Sprung Clutch Kit for 2007–2013 Mazda 3 / Mazdaspeed 3 2.3L Turbo
The ACT ZX4-HDSS Heavy Duty Performance Street sprung clutch kit delivers 45% more torque capacity (420 ft-lbs) over stock for 2007–2013 Mazda 3 and Mazdaspeed 3 with the 2.3L MZR-DISI turbo engine, featuring ACT’s exclusive diaphragm pressure plate with 20–40% increased clamp load and a premium organic sprung disc that provides smooth engagement, quick shifts, and excellent daily drivability while eliminating factory clutch slip under hard launches or tuned power levels up to 400+ WHP.
Engineered with ACT’s proven spring-center design for reduced rattle and heat-treated chrome-moly hub for durability, the kit includes a heavy-duty pressure plate, performance street disc, release bearing, pilot bearing, and alignment tool for complete bolt-on installation. Direct replacement for factory clutch with no flywheel modifications required (works with stock or ACT lightweight flywheel).
For Mazdaspeed 3 and Mazda 3 2.3L turbo owners demanding reliable power delivery with stock-like drivability, the ACT ZX4-HDSS is the gold-standard clutch trusted on thousands of tuned daily drivers and weekend warriors worldwide.
Key Features
- 45% increased torque capacity – 420 ft-lbs
- Heavy Duty pressure plate with 20–40% more clamp load
- Premium organic sprung disc – smooth & fast shifts
- Heat-treated chrome-moly hub & spring-center design
- Includes release bearing, pilot bearing & alignment tool
- Direct bolt-on – no flywheel mods needed
Product Notes
- Fits 2007–2013 Mazda 3 2.3L Turbo & Mazdaspeed 3
- 6-speed manual transmission only
- Recommended with ACT or stock flywheel
California Proposition 65: Contains chemicals known to the State of California to cause cancer or reproductive harm.
Warranty: 12 months / 12,000 miles to original purchaser.
Installation Notes
- Professional installation recommended
- Torque pressure plate bolts to 22 ft-lbs in star pattern
- Break-in with 500 easy miles
- Re-torque after 500 miles
This Part Fits
| Year | Make | Model | Engine |
|---|---|---|---|
| 2007–2013 | Mazda | 3 | 2.3L MZR-DISI Turbo |
| 2007–2013 | Mazda | Mazdaspeed 3 | 2.3L MZR-DISI Turbo |
Note: 6-speed manual only. All trims.
What’s Included in the Purchase
- Heavy Duty Pressure Plate
- Performance Street Sprung Disc
- Release Bearing
- Pilot Bearing
- Alignment Tool
- Part Number: ACT ZX4-HDSS
Why Choose ACT?
- Over 30 years of championship-winning clutch engineering
- Dyno-tested on real vehicles
- 12-month/12,000-mile warranty
Frequently Asked Questions
- Q: Pedal feel?
A: Moderate increase – smooth daily engagement - Q: Chatter?
A: Minimal – sprung organic disc is very street-friendly - Q: Holds how much power?
A: Safely 380–400 WHP on tuned Mazdaspeed 3
Shipping & Handling
- Method: UPS or Fed Ex Ground.
- Availability: Typically ships same day or next if in stock.
- Packaging: Protective retail box.
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