Heavy Duty Race Sprung 4 Pad Clutch Kit

ACT Heavy Duty Race Sprung 4 Pad Clutch Kit (Z66-HDG4)

Z66-HDG4 kit features ACT's most popular Heavy Duty pressure plate. 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 4-pad spring-centered race disc features a spring-center to properly damp torsional vibrations for quieter operation and resist failure even under harsh conditions. ACT spring retainers utilize wraparound spring windows and thicker retainer stampings to provide spring support, reduce stress concentrations, and increase strength and reliability. With the 4-pad spring-centered race disc, engagement is harsher, but shifting is faster. ACT's 4-pad spring-centered race disc is well-suited for smaller disc sizes in smaller engines.

Kit contents

• MZ018 - ACT Heavy Duty Clutch Pressure Plate
• 4224205 - ACT 4 Pad Sprung Race Clutch Disc
• PB1005 - ACT Clutch Pilot Bearing
• RB110 - ACT Clutch Release Bearing
• AT05 - ACT Clutch Alignment Tool

Specifications

• Product weight (lbs.): 13.7
• Torque capacity (ft/lbs.): 355
• Torque capacity over OE: 87%
• Disc material: Ceramic
• Clutch disc diameter (in.): 8.8
• Clutch disc diameter (mm): 224
• Input shaft diameter (in.): 0.9375
• Pressure plate type: Heavy Duty
• Warranty: 12 months

Characteristics

• Feel: Light to moderate pedal effort, aggressive engagement, OE to mild gear rattle
• Life: Moderate friction life, extended by ACT's exclusive diaphragm design
• Quality: Carefully engineered, precisely assembled, accurately balanced, uses select ceramic friction materials for high heat tolerance and maximum performance
• Recommended Use: Recommended for high horsepower street or race use
• ACT Difference: 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability

Fitment

• 1993-1997 Ford Probe Base; 1993-1996 Probe SE; 1997 Probe GTS
• 1993-1998 Mazda 626 DX; 1993-2002 626 LX; 1999-2001 626 ES
• 1993-1997 Mazda MX-6 Base
• 2001-2003 Mazda Protege ES/LX; 2001 Protege MP3; 2002-2003 Protege DX; 2002-2003 Protege5; 2003 Protege Mazdaspeed

Q: Best high horsepower clutch kit for a 2001-2003 Mazda Protege or 2003 Protege Mazdaspeed?
A: The ACT Z66-HDG4 Heavy Duty Race Sprung 4 Pad Clutch Kit is recommended for high horsepower street or race use and fits the 2001-2003 Mazda Protege (ES/LX 2001-2003; MP3 2001; DX 2002-2003) and the 2003 Protege Mazdaspeed. It also fits the 2002-2003 Protege5, the Ford Probe (Base 1993-1997; SE 1993-1996; GTS 1997), the Mazda 626 (DX 1993-1998; LX 1993-2002; ES 1999-2001) and the 1993-1997 Mazda MX-6 Base. See the fitment list for exact trims and years.

Q: What comes in the ACT Z66-HDG4 clutch kit for a 2001-2003 Mazda Protege or 2003 Protege Mazdaspeed?
A: It includes MZ018 - ACT Heavy Duty Clutch Pressure Plate; 4224205 - ACT 4 Pad Sprung Race Clutch Disc; PB1005 - ACT Clutch Pilot Bearing; RB110 - ACT Clutch Release Bearing; AT05 - ACT Clutch Alignment Tool.

Q: Is the ACT Z66-HDG4 clutch kit good for a street-driven 2001-2003 Mazda Protege or 2003 Protege Mazdaspeed?
A: Yes. Recommended for high horsepower street or race use. Feel: light to moderate pedal effort, aggressive engagement, OE to mild gear rattle.

Q: How much torque does the ACT Z66-HDG4 hold vs a stock 2001-2003 Mazda Protege or 2003 Protege Mazdaspeed clutch?
A: 355 ft/lbs. torque capacity, 87% over OE.

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