ACT Sprung Street Disc w/ HD Pressure Plate | 2002-2005 Subaru WRX, 2004-2005 Subaru Baja Turbo, and 2008 Subaru Legacy GT Spec.B (SB9-HDSS)

ACT Clutch Kits & Flywheels
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ACT Sprung HD Street Clutch Kit

SB9-HDSS kit features ACT's most popular Heavy Duty pressure plate and most popular street disc. 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 Performance street discs are the most popular disc purchased. They feature premium organic materials with high copper content for better heat transfer and steel-backed lining for greater burst strength and durability. These discs feature a reduced marcel for faster shift action to complement ACT pressure plates.

Quiet operation with increased strength and reliability. 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.): 430
  • Torque Capacity Over OE: 33%
  • Light to moderate pedal effort, smooth positive engagement, OE to mild gear rattle
  • Longer friction life, extended by ACT's exclusive diaphragm design
  • Carefully engineered, precisely assembled, accurately balanced, with premium organic friction materials for heat tolerance and reduced fade
  • Recommended for street and race use
  • 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability


  • 2002 Subaru Impreza WRX 2.0L
  • *Must be used with ACT flywheel or 2003 to 2005 WRX flywheel
  • 2003-2005 Subaru Impreza WRX 2.0L
  • 2008 Subaru Legacy GT spec.B 2.5L
  • *Designed for use with stock dual-mass flywheel
  • 2004-2005 Subaru Baja Turbo 2.5L
  • 1991-1994 Subaru Legacy Sport 2.2L
  • 2004-2005 Subaru Forester XT 2.5L
  • *Must be used with ACT flywheel or 2003 to 2005 WRX flywheel

What's in the box?

  • 3000504 - Perf Street Sprung Disc
  • AT90 - Alignment Tool
  • PB1004 - Pilot Bearing
  • RB601 - Release Bearing
  • SB018 - Heavy Duty Pressure Plate
  • Installation Instructions!

Customer Reviews

Based on 3 reviews
Excellent quality

The monoloc product that conss with is awsome!
Perfect fitment

Isaiah Gatlin
This clutch is nothing other than perfection.

Ordered it and needed it quickly so I payed the extra for next day shipping and it came the next day as promised. The alignment tool helped out a ton with fitment and it fit amazing. 5 stars highly recommend.

Amazing like always with act

Act does a great job building parts and customer service is also good with them.