Includes Monoloc.
XT-M/Perf Street Sprung
Moderate to heavy pedal effort, smooth positive engagement, OE to mild gear rattle, confidence during hard shifts; Longer friction life, extended by ACT’s exclusive diaphragm design, dramatic improvement in release mechanism life; Carefully engineered, precisely assembled, accurately balanced, with premium organic friction materials for heat tolerance and reduced fade, major improvement in release mechanism; Recommended for street and race use; 100% clamp load tested and dynamically computer balanced for smooth high RPM reliability, includes ACT’s patented Monoloc
SB10-XTSS kit features an Xtreme pressure plate for the most demanding driver. ACT Xtreme 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 higher 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.

Fits
Subaru Impreza WRX STI 2004 to 2014
Subaru Impreza WRX STI Limited 2007
Subaru Impreza WRX STI Limited 2011 to 2014
Subaru Impreza WRX STI Special Edition 2010
Subaru Legacy GT spec.B 2007 to 2009
Subaru WRX STI Base 2015 to 2021
Subaru WRX STI Launch Edition 2015
Subaru WRX STI Limited 2015 to 2021