Part Number: SB9-HDR4

Description: ACT HD-M/Race Rigid 4 Pad Clutch Kit

Clutch Disc Diameter: 228

Input Spline Quantity: 24

Input Shaft Diameter: 1

Part Fitment Requirement: Includes ACT Monoloc.

Product Weight (lbs.): 14.8

Torque Capacity (ft/lbs.): 555

Torque Capacity Over OE: 63%

Pressure Plate Type: Heavy Duty

Disc Material: Ceramic

Pilot Bushing Included: No

Release Bearing Included: Yes

Alignment Tool Included: Yes

Grease Included: Yes

Pilot Bearing Included: Yes

Disc Type Sprung Solid: Solid

Clutch Slave Cylinder Included: No

Clutch Master Cylinder Included: No

Grade Type: Performance

Pressure Plate Bolts Included: No

Flywheel Bolts Included: No

Fitment: 02-05 Subaru WRX w/ACT Flywheel

Details:

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.

Features and Benefits

• "Excellence in Performance", backed by the best one-year warranty in the industry!