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
Installation Instructions


This Part Fits:

Year	Make	Model	Submodel
2005	Subaru	Forester	XT
2006-2008	Subaru	Forester	XT Limited
2005	Subaru	Forester	XT Premium
2002-2007	Subaru	Impreza	WRX
2006-2007	Subaru	Impreza	WRX Limited
2004-2014	Subaru	Impreza	WRX STI
2007,2011-2014	Subaru	Impreza	WRX STI Limited
2010	Subaru	Impreza	WRX STI Special Edition
2006-2007	Subaru	Impreza	WRX TR
2015-2020	Subaru	WRX STI	Base
2015	Subaru	WRX STI	Launch Edition
2015-2020	Subaru	WRX STI	Limited
2019	Subaru	WRX STI	S209
2016	Subaru	WRX STI	Series.HyperBlue
2018	Subaru	WRX STI	Type RA