The ACT SB10-XTG6 kit pairs a Xtreme pressure plate with a 6-pad spring-centered race disc for the most demanding street and race use on the WRX STI platform. ACT's Xtreme pressure plate uses an exclusive diaphragm design to increase clamp load, reduce deflection, and extend clutch life for the most demanding drivers. All diaphragms go through a four-stage heat-treating process, and precision cover stampings add rigidity and consistency. Xtreme pressure plates increase clamp load by 50 to 120 percent over stock. ACT's 6-pad spring-centered race disc uses a spring-center construction to properly damp torsional vibrations and resist failure under harsh conditions. ACT spring retainers use wraparound spring windows and thicker retainer stampings for spring support and increased strength. Engagement is harsher than a street disc, but shifting is faster, and the 6-pad spring-centered disc is recommended for larger clutch sizes to absorb more heat. The kit also includes ACT's Monoloc, a one-piece, direct replacement for the standard two-piece wedge collar and wire ring used in pull-type clutches. Monoloc's segmented retaining ring tension is carefully calculated and tested to provide uniform loading on the bearing and pressure plate for consistent alignment, regardless of driver input or vehicle modifications, and its hardened chrome-moly steel construction is built to last.
WarrantyInstallation Instructions
Specifications:
- Pressure Plate: Xtreme pressure plate, four-stage heat-treated diaphragm
- Disc: 6-pad spring-centered race disc
- Clamp Load: 50-120% increase over stock
- Retaining Ring: ACT Monoloc, one-piece hardened chrome-moly (included)
- Part Number: SB10-XTG6
Vehicle Applications:
- 2004 Subaru Impreza WRX STI
- 2005 Subaru Impreza WRX STI
- 2006 Subaru Impreza WRX STI
- 2007 Subaru Impreza WRX STI
- 2008 Subaru Impreza WRX STI
- 2009 Subaru Impreza WRX STI
- 2010 Subaru Impreza WRX STI
- 2011 Subaru Impreza WRX STI
- 2012 Subaru Impreza WRX STI
- 2013 Subaru Impreza WRX STI
- 2014 Subaru Impreza WRX STI
- 2007 Subaru Impreza WRX STI Limited
- 2011 Subaru Impreza WRX STI Limited
- 2012 Subaru Impreza WRX STI Limited
- 2013 Subaru Impreza WRX STI Limited
- 2014 Subaru Impreza WRX STI Limited
- 2010 Subaru Impreza WRX STI Special Edition
- 2007 Subaru Legacy GT spec.B
- 2008 Subaru Legacy GT spec.B
- 2009 Subaru Legacy GT spec.B
- 2015 Subaru WRX STI Base
- 2016 Subaru WRX STI Base
- 2017 Subaru WRX STI Base
- 2018 Subaru WRX STI Base
- 2019 Subaru WRX STI Base
- 2020 Subaru WRX STI Base
- 2021 Subaru WRX STI Base
- 2015 Subaru WRX STI Launch Edition
- 2015 Subaru WRX STI Limited
- 2016 Subaru WRX STI Limited
- 2017 Subaru WRX STI Limited
- 2018 Subaru WRX STI Limited
- 2019 Subaru WRX STI Limited
- 2020 Subaru WRX STI Limited
- 2021 Subaru WRX STI Limited
- 2019 Subaru WRX STI S209
- 2016 Subaru WRX STI Series.HyperBlue
- 2018 Subaru WRX STI Type RA
Warning: This product can expose you to chemicals including carbon black, glass wool fibers, or silica (in clutch discs), chromium and nickel, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov
FAQ
What does the SB10-XTG6 kit include?
The SB10-XTG6 kit includes an ACT pressure plate, a matching disc, and ACT's Monoloc retaining ring.
What does ACT's Monoloc do?
Monoloc is a one-piece, direct replacement for the standard two-piece wedge collar and wire ring used in pull-type clutches. Its hardened chrome-moly construction provides uniform loading on the bearing and pressure plate for consistent alignment, regardless of driver input or vehicle modifications.
Is this kit suited for street or race use?
It is built around a 6-pad race-style disc paired with a performance pressure plate, making it best suited to dedicated race or heavy track/street use rather than a quiet daily-driver setup.
Does this kit fit the WRX STI and the Legacy GT spec.B?
Yes, this kit covers the 2004-2014 Subaru Impreza WRX STI, 2015-2021 WRX STI, and 2007-2009 Legacy GT spec.B. See the full Vehicle Applications list above to confirm the exact year and trim.