SB9-HDR4 kit features ACT's most popular Heavy Duty pressure plate. 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 4-pad rigid race discs are made with high quality, ceramic friction materials. The chrome-moly hub is heat-treated for strength and durability. The lightweight, rigid design allows for quicker shifts and smooth, trouble-free service. With the 4-pad rigid race disc engagement is harsher, but shifting is faster. The 4-pad rigid race disc is well-suited for the smaller disc sizes in smaller engines. 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.
Torque Capacity (ft/lbs): 555
Clutch Disc Diameter (mm): 228
Input Shaft Diameter (inches): 1"
Input Spline Spline Count: 24
What's Inside The Kit?
Pressure Plate: SB018
Clutch Disc: 4228018
Release Bearing: RB601
Pilot Bearing: PB1004
Alignment Tool: AT90
04-05 Subaru Forester XT 2.5 EJ255 *Must use ACT flywheel or 03-05 WRX flywheel*
08-09 Subaru Legacy GT 2.5 Turbo EJ255 *SPEC B Only. For OEM dual mass flywheel*
02-05 Subaru Impreza WRX 2.0 Turbo EJ205 *2002 must use ACT or 03-05 OEM flywheel*