ACT PRESSURE PLATE-MONOLOC HEAVY DUTY 04-14 WRX STI / 07-09 LEGACY GT SPEC B

ACT Performance clutch is recognized as a leader in high performance clutch solutions. Every ACT clutch is designed to be a bolt-on solution and will utilize all factory alignment tools and mounting points. ACT clutches are engineered and assembled in America with the highest level of manufacturing and quality control standards. When choosing a clutch you want to make sure you select the correct clutch for your application. For example, race clutches can often times be too aggressive for the street causing the user to have difficulty starting and operating the clutch while driving. For most applications STILLEN recommends ACT’s “street discs.” These clutches can hold more power than the factory units while still offering streetable driving characteristics. If your car produces significantly more power than factory or you are using the car for racing purposes we would recommend upgrading to a full race “puck” clutch.

ACT aims to provide the best pedal feel, raised torque capacity and extended wear life. STILLEN and ACT have been working together for more than 2 decades to offer superior clutch products to our customers.

Features and Benefits:

• Made in America
• Improved pedal feel
• Increased torque capacity
• Friction material selected for high heat resistance, quick recovery, excellent friction and long service life
• Quicker shifting and engagement
• Improved assembly materials for higher burst strength
• Precision broached splines ensure superior fit to input shaft
• Heat treated spring windows and drive plates
• SFI certified

Light to moderate pedal effort, confidence during hard shifts, positive engagement

Available life extended by ACT's exclusive diaphragm design, dramatic improvement in release mechanism life

Carefully engineered for improved durability, precisely assembled, accurately balanced, major improvement in release mechanism

Recommended for street and race use

100% clamp load tested and dynamically computer balanced for smooth high RPM reliability, includes ACT's patented Monoloc


SB019 is an ACT pressure plate that uses 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 Heavy Duty pressure plates increase clamp load by 20 to 50 percent. ACT’s Heavy Duty pressure plates are recommended for use with a street or race disc. Monoloc is a one-piece, direct replacement or upgrade to the standard, two-piece wedge collar and wire ring featured in pull-type clutches. The spring tension of the segmented retaining ring is carefully calculated and tested for optimal performance. It provides uniform loading on the bearing and pressure plate to assure proper alignment, regardless of driver influence or vehicle modifications. Monoloc’s hardened chrome-moly steel construction will provide years of service.