ACT SB11-HDR4 Heavy Duty Race Rigid 4 Pad Clutch Kit w/ Flywheel - 2008+ Subaru WRX - Draven Performance
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ACT SB11-HDR4 Heavy Duty Race Rigid 4 Pad Clutch Kit w/ Flywheel - 2008+ Subaru WRX

$896.00 USD
$896.00 USD

Introducing the ACT Heavy Duty Race Rigid 4 Pad Clutch Kit with Flywheel for the 2008-2014 Subaru WRX and 2015-2018 Subaru WRXThe SB11-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.

Application Note: 240mm upgrade. Must use ACT flywheel (included in kit).


  • Feel - Light to moderate pedal effort, aggressive engagement, increased gear rattle
  • Life - Moderate friction life, extended by ACT's exclusive diaphragm design, rigid design may increase spline wear
  • Quality - Carefully engineered, precisely assembled, accurately balanced, uses select ceramic friction materials for high heat tolerance and maximum performance
  • Recommended Use - Recommended for race use only
  • ACT Difference - 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability


Part Number: SB11-HDR4
Description: HD/Race Rigid 4 Pad
Torque Capacity (ft/lbs.): 565
Torque Capacity Over OE: 69%
Flywheel Tooth Count: 124
Disc Type: Race Disc
Spline Count: 24
Spline Size (in.): 1 
Disc Diameter (in.): 9.4
Disc Diameter (mm.): 240
Pressure Plate Type: Heavy Duty
Product Weight (lbs.): 27.1
Kit Contents: SB020, 4240018, 600890, RB844, PB1004, AT90

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