ACT's most popular Heavy Duty pressure plate is the ST1-HDG6.
Exclusive diaphragm design is used by ACT Heavy Duty pressure plates to increase clamp load, reduce deflection, and maximize clutch life.
A four-stage, heat-treating process is endured by all diaphragms for unparalleled performance.
Precision cover stampings are featured by ACT pressure plates to provide rigidity and consistency.
A spring-centered race disc with 6-pads features a spring-center to properly damp torsional vibrations and resist failure under harsh conditions.
Wraparound spring windows and thicker retainer stampings are utilized by ACT spring retainers to provide spring support, reduce stress concentrations, and increase strength and reliability.
Engagement is harsher with the 6-pad, spring-centered race disc, but shifting is faster.
For larger clutch sizes, the 6-pad, spring-centered disc is recommended to absorb more heat.
