ACT Extreme Race Rigid 4 Pad Solid Clutch Kit | Subaru WRX (02-05) (SB9-XTR4)2002 2005 WRX ACT Xtreme 4 Puck Solid Clutch Kit SB9 XTR4 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 rigid race