The ACT SB019 Heavy Duty pressure plate uses an exclusive diaphragm design to increase clamp load, reduce deflection, and extend clutch life. All ACT diaphragms go through a four-stage heat-treating process, and precision cover stampings add rigidity and consistency to the pressure plate. Heavy Duty pressure plates increase clamp load by 20 to 50 percent over stock and are recommended for use with a street or race disc. The SB019 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 Type: Heavy Duty, four-stage heat-treated diaphragm
- Clamp Load: 20-50% increase over stock
- Cover: Precision-stamped for rigidity and consistency
- Retaining Ring: ACT Monoloc, one-piece hardened chrome-moly (included)
- Recommended Use: Pair with a street or race disc
- Part Number: SB019
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 ACT Monoloc included with the SB019 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.
Does the SB019 come with a disc?
No, the SB019 is a pressure plate (with Monoloc) only. Pair it with a compatible street or race disc to complete the clutch.
What does the SB019 pressure plate's clamp load increase do?
It increases clamp load by 20 to 50 percent over the stock pressure plate to reduce slippage and extend clutch life.
Does the SB019 fit the WRX STI and the Legacy GT spec.B?
Yes, the SB019 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.