What is the main difference between this race clutch and a stock clutch?

This ACT race clutch has a higher clamp load pressure plate and a 4-pad race disc. Engagement will be harsher, but it allows for faster shifting and is built to handle more power than a stock clutch.

Does this clutch kit include the flywheel?

This kit includes the ACT Heavy Duty pressure plate and the ACT 4-pad spring-centered race disc. The flywheel is not included and must be purchased separately.

Is this clutch kit streetable?

While it includes a spring-centered disc to help damp vibrations, the engagement is described as harsher. It is well-suited for race applications and may be less comfortable for daily street driving compared to a stock clutch.

ACT

ACT 1991 Mazda Miata HD/Race Sprung 4 Pad Clutch Kit

Name: ACT 1991 Mazda Miata HD/Race Sprung 4 Pad Clutch Kit
Brand: ACT
Price: 516.80 USD
Availability: InStock

$516.80

ACT makes this HD/Race Clutch Kit for your 1991 Mazda Miata. It's built for harsh conditions and faster shifting.

Key Features

Heavy Duty pressure plate — increases clamp load and clutch life.
4-pad spring-centered race disc — damps vibrations and allows for faster shifting.
Heat-treated diaphragms — ensure consistent performance.
Precision cover stampings — add rigidity and consistency to the pressure plate.
Wraparound spring windows and thick retainers — increase strength and reliability of the clutch springs.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

Fits this vehicle

Mazda Miata 1990-1993

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Since 1957

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Product Details

ZM1-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.