ACT Heavy Duty Performance Street Disc Clutch Kit STI (2004-2018) Mazda Mishimoto's X-Line racing radiator has

Mishimoto's X-Line racing radiator has 3 rows for a core that is 25% larger than the standard version

OEM mounts are made of sub-par material with rubber bushings that are infamous for deteriorating

- 80% torque capacity over stock

These harder bushings eliminate all the rear sub frame movement during hard lateral loads

ACT Heavy Duty Performance Street Disc Clutch Kit STI (2004-2018) Mazda Mishimoto's X-Line racing radiator hasThe SB10 HDSS kit from ACT for the Subaru STI features ACT's most popular Heavy Duty pressure plate and most popular street disc. ACT Heavy Duty 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 Performance