ACT Heavy Duty 4 Puck Sprung Disc Clutch Kit | 2006-2021 Subaru WRX (SB5-HDG4)

ACT HD/Race Sprung 4 Pad Clutch Kit

SB5-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.

Features

• Torque Capacity (ft/lbs.): 535
• 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

Applications

• 2006-2020 Subaru WRX
• 2006 Saab 9-2X Aero 2.5L/2458cc H 4 Turbocharged
• 2006 Subaru Baja Turbo
• 2006-2007 Subaru Forester XT Limited
• 2008 Subaru Forester 2.5 XT
• 2005-2012 Subaru Legacy GT / Limited / Spec B
• *230mm
• *5 Speed applications only
• *Must be used with ACT flywheel or factory flywheel for 2006 and newer WRX (not included)

What’s in the box?

• 4228218 – 4 Pad Sprung Race Disc
• AT90 – Alignment Tool
• PB1004 – Pilot Bearing
• RB844 – Release Bearing
• SB014 – P/PL Heavy Duty Pressure Plate
• Installation Instructions!

Specifications

• Description: HD/Race Sprung 4 Pad
• Torque Capacity (ft/lbs.): 535
• Torque Capacity Over OE: 69%
• Disc Type: Race Disc
• Spline Count: 24
• Spline Size (in.): 1
• Disc Diameter (in.): 9
• Disc Diameter (mm.): 228
• Pressure Plate Type: Heavy Duty
• Product Weight (lbs.): 14.4