ACT 4-Pad Sprung HD Prolite Racing Clutch Kit (13-21 BRZ/FR-S/86)

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$ 743 $ 953

ACT 4-Pad Sprung HD Prolite Racing Clutch Kit

SB8-HDG4 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 spring-centered race disc features a spring-center to properly damp torsional vibrations for quieter operation and resist failure even under harsh conditions. ACT spring retainers utilize wraparound spring windows and thicker retainer stampings to provide spring support, reduce stress concentrations, and increase strength and reliability. With the 4-pad spring-centered race disc, engagement is harsher, but shifting is faster. ACT's 4-pad spring-centered race disc is well-suited for smaller disc sizes in smaller engines.


  • Light to moderate pedal effort, aggressive engagement, OE to mild gear rattle
  • Moderate friction life, extended by ACT's exclusive diaphragm design
  • Carefully engineered, precisely assembled, accurately balanced, uses select ceramic friction materials for high heat tolerance and maximum performance
  • Recommended for high horsepower street or race use
  • 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability

Please Note:

  • Must use ACT Flywheel (Included in kit)
  • Recommended for race use only


  • 2013-2016 Scion FR-S
  • *Conversion kit - Includes ACT Prolite flywheel.
  • 2013-2021 Subaru BRZ
  • *Conversion kit - Includes ACT Prolite flywheel.

Installation Instructions

What's in the box?

  • 1 - 4224218-1 - 4 Pad Sprung Race Disc
  • 1 - 600700 - XACT Flywheel Prolite
  • 1 - AT90 - Alignment Tool
  • 1 - PB1004 - Pilot Bearing
  • 1 - RB004 - Release Bearing
  • 1 - SB017 - P/PL Heavy Duty


  • Description: HD/Race Sprung 4 Pad
  • Torque Capacity (ft/lbs.): 345
  • Torque Capacity Over OE: 1.17
  • Flywheel Tooth Count: 124
  • Disc Type: Race Disc
  • Spline Count: 24
  • Spline Size (in.): 1
  • Disc Diameter (in.): 8.8
  • Disc Diameter (mm.): 224
  • Pressure Plate Type: Heavy Duty
  • Product Weight (lbs.): 24.8

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