HC4-SPG6 kit features a Sport pressure plate for a nice upgrade. ACT Sport 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 6-pad, spring-centered race disc features a spring-center construction to properly damp torsional vibrations and resist failure 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 6-pad, spring-centered race disc, engagement is harsher, but shifting is faster. The 6-pad, spring-centered disc is recommended for larger clutch sizes to absorb more heat.

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

Recommendation:

Recommended for high horsepower street or race use

Difference:

100% clamp load tested and dynamically computer balanced for smooth high RPM reliability

Must use with 90-01 SOHC Flywheel