ACT Heavy Duty Clutch Pressure Plate 2004-2021 STI

DESCRIPTION

The ACT Heavy Duty Clutch Pressure Plate is designed for 2004–2021 Subaru WRX STI models as a replacement for worn ACT Heavy Duty pressure plates. This SB019 unit uses ACT’s exclusive diaphragm design to increase clamp load, reduce deflection, and maximize clutch life. Heat-treated diaphragms and precision cover stampings ensure consistent performance, while the Heavy Duty design increases clamp load by 20 to 50 percent. It is compatible with street or race clutch discs and includes the Monoloc one-piece retaining ring to maintain proper bearing alignment and ensure long-term durability under repeated high-RPM use.

WHY?

If your Subaru STI’s Heavy Duty pressure plate has worn out, this replacement allows you to restore clutch performance without purchasing a full kit. ACT’s diaphragm design and heat-treated construction deliver reliable clamp load, positive engagement, and confidence during hard shifts. The Monoloc system ensures proper alignment and smooth operation, giving drivers a durable and long-lasting pressure plate suitable for both street and race use.

FEATURES:

• ACT Heavy Duty diaphragm pressure plate

• Increases clamp load by 20 to 50 percent

• Light to moderate pedal effort with positive engagement

• Compatible with street and race clutch discs

• Monoloc one-piece retaining ring for proper bearing alignment

• Heat-treated diaphragms and precision cover stampings for durability

• Limited retail warranty and installation instructions included

COMPATIBILITY

2004-2021 STI

SPECIFICATIONS