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GFB HYBRID TMS Dual Port 01-07 Subaru WRX / 05-08 Forester XT

ALL THE PERFORMANCE WITH THE NOISE! The Hybrid valve is back! In 1999, GFB's first Hybrid valve pioneered the dual port design, which was so successful the technology has since been adopted by most other brands.

By "staging" the two venting outlets, at low valve lifts most of the air is recirculated. As the car is driven harder, the valve opens further and more of the atmosphere venting port is exposed for a louder sound.

  • Dual staged venting outlets, configurable for full recirculation, 50/50, or full atmosphere operation using the provided plugs.
  • TMS technology enables up to 30% faster boost recovery on gearshift
Make Model Year Type
Subaru Forester 2005 XT
Subaru Forester 2005 XT Premium
Subaru Forester 2006 XT Limited
Subaru Forester 2007 XT Limited
Subaru Forester 2008 XT Limited
Subaru Impreza 2002 WRX
Subaru Impreza 2003 WRX
Subaru Impreza 2004 WRX
Subaru Impreza 2004 WRX STI
Subaru Impreza 2005 WRX
Subaru Impreza 2005 WRX STI
Subaru Impreza 2006 WRX
Subaru Impreza 2006 WRX Limited
Subaru Impreza 2006 WRX STI
Subaru Impreza 2006 WRX TR
Subaru Impreza 2007 WRX
Subaru Impreza 2007 WRX Limited
Subaru Impreza 2007 WRX STI
Subaru Impreza 2007 WRX STI Limited
Subaru Impreza 2007 WRX TR
Subaru Impreza 2008 WRX STI
Subaru Impreza 2009 WRX STI
Subaru Impreza 2010 WRX STI
Subaru Impreza 2010 WRX STI Special Edition
Subaru Impreza 2011 WRX STI
Subaru Impreza 2011 WRX STI Limited
Subaru Impreza 2012 WRX STI
Subaru Impreza 2012 WRX STI Limited
Subaru Impreza 2013 WRX STI
Subaru Impreza 2013 WRX STI Limited
Subaru Impreza 2014 WRX STI
Subaru Impreza 2014 WRX STI Limited
Subaru WRX STI 2015 Base
Subaru WRX STI 2015 Launch Edition
Subaru WRX STI 2015 Limited
Subaru WRX STI 2016 Base
Subaru WRX STI 2016 Limited
Subaru WRX STI 2016 Series.HyperBlue
Subaru WRX STI 2017 Base
Subaru WRX STI 2017 Limited
Subaru WRX STI 2018 Base
Subaru WRX STI 2018 Limited
Subaru WRX STI 2018 Type RA
Subaru WRX STI 2019 Base
Subaru WRX STI 2019 Limited
Subaru WRX STI 2019 S209
Subaru WRX STI 2020 Base
Subaru WRX STI 2020 Limited
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