GFB 02-07 WRX / 04-10 STI TMS Respons Blow Off Valve Kit

If cars like yours typically suffer issues such as backfiring and stalling when using a fixed-ratio atmosphere-venting BOV, the Respons can help. By adjusting the venting bias to suit the car you can achieve a blow-off sound without having to put up with the issues. Like all GFB valves, the Respons utilises GFB’s proven TMS Technology to ensure rapid boost recovery on gearshift and optimum throttle response, as well as the ability to withstand boost pressures of 100psi+. Put simply, it can hold more boost than any turbo could produce.
GFB’s Respons, allowing you to infinitely vary how much air is recirculated or vented to atmosphere. Simply by twisting the adjustment ring, you can change the sound of your BOV from silent to ear-shattering!?.
Subaru WRX MY01-07, STi MY02-on, XT Forester MY05-08

Fitment:
Subaru Forester Sports 2.5 XT 2008
Subaru Forester XT 2004 to 2005
Subaru Forester XT Limited 2006 to 2008
Subaru Forester XT Premium 2005
Subaru Impreza L 2001
Subaru Impreza Outback 2001 to 2004
Subaru Impreza Outback Sport 2005
Subaru Impreza RS 2001 to 2005
Subaru Impreza TS 2002 to 2004
Subaru Impreza WRX 2002 to 2007
Subaru Impreza WRX Limited 2006 to 2007
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 Impreza WRX TR 2006 to 2007
Subaru WRX STI Base 2015 to 2020
Subaru WRX STI Launch Edition 2015
Subaru WRX STI Limited 2015 to 2020
Subaru WRX STI S209 2019
Subaru WRX STI Series.HyperBlue 2016