ACT Extreme Race Sprung 4 Pad Clutch Kit | Multiple Subaru Fitments (SB11-XTG4)XT Race Sprung 4 Pad Clutch Kit by ACT SB11 XTG4 kit features an Xtreme pressure plate for the most demanding driver. ACT Xtreme 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