Heavy Duty Race Rigid 4 Pad Clutch Kit

ACT Heavy Duty Race Rigid 4 Pad Clutch Kit (Z66-HDR4)

Z66-HDR4 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 rigid race discs are made with high quality, ceramic friction materials. The chrome-moly hub is heat-treated for strength and durability. The lightweight, rigid design allows for quicker shifts and smooth, trouble-free service. With the 4-pad rigid race disc, engagement is harsher, but shifting is faster. The 4-pad rigid race disc is well-suited for the smaller disc sizes in smaller engines.

Kit contents

• MZ018 - ACT Heavy Duty Clutch Pressure Plate
• 4224005 - ACT 4 Pad Rigid Race Clutch Disc
• PB1005 - ACT Clutch Pilot Bearing
• RB110 - ACT Clutch Release Bearing
• AT05 - ACT Clutch Alignment Tool

Specifications

• Product weight (lbs.): 12.3
• 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, increased gear rattle
• Life: Moderate friction life, extended by ACT's exclusive diaphragm design, rigid design may increase spline wear
• Quality: Carefully engineered, precisely assembled, accurately balanced, uses select ceramic friction materials for high heat tolerance and maximum performance
• Recommended Use: Recommended for race use only
• 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 race clutch kit for a 2001-2003 Mazda Protege or 2003 Protege Mazdaspeed?
A: The ACT Z66-HDR4 Heavy Duty Race Rigid 4 Pad Clutch Kit is recommended for race use only 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-HDR4 clutch kit for a 2001-2003 Mazda Protege or 2003 Protege Mazdaspeed?
A: It includes MZ018 - ACT Heavy Duty Clutch Pressure Plate; 4224005 - ACT 4 Pad Rigid Race Clutch Disc; PB1005 - ACT Clutch Pilot Bearing; RB110 - ACT Clutch Release Bearing; AT05 - ACT Clutch Alignment Tool.

Q: Is the ACT Z66-HDR4 clutch kit meant for street or race use on a 2001-2003 Mazda Protege or 2003 Protege Mazdaspeed?
A: Recommended for race use only. Feel: light to moderate pedal effort, aggressive engagement, increased gear rattle.

Q: How much torque does the ACT Z66-HDR4 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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