All the performance with or without the noise!

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.

How GFB’s patented venting bias adjustment works

Twisting the adjusting ring opens up the atmo port, whilst the recirc port is simultaneously closed.This results in possible venting ratios ranging from 100% recirc, right through to 100% atmosphere and anywhere in between.

Complete Range of Fitment Options

The Respons direct fit bolt-on range covers a huge list of popular vehicles. You can also purchase a variety of hose and flange adaptors for custom fitments.

Performance AND sound without compromise!

• Patented Venting Bias Adjustment system - can be infinitely adjusted between full recirc (silent) and full atmosphere (loud)
• Change the venting bias simply by twisting the adjustment ring
• TMS Technology for up to 30% faster boost recovery on gearshift
• Huge range of direct bolt-on kits
• 100psi+ boost holding ability
• Manufactured in Australia in accordance with 

  ONLY COMPATIBLE WITH:

   

  Make	Model	Mark	Variant	EngineCodes	BodyStyle	DriveType	FuelType	YearFrom	YearTo
  Subaru	Forester	SH	2.5	EJ25	SUV	All-wheel Drive	Petrol	2009	2024
  Subaru	Forester	SH	2.5	EJ255	SUV	All-wheel Drive	Petrol	2008	2024
  Subaru	Impreza	GE	2.5 WRX SE AWD	EJ255	Hatchback	All-wheel Drive	Petrol	2012	2024
  Subaru	Impreza	GR	2.5 WRX SE AWD	EJ255	Hatchback	All-wheel Drive	Petrol	2011	2015
  Subaru	Impreza	GR	2.5 WRX SE AWD	EJ255	Saloon	All-wheel Drive	Petrol	2011	2015
  Subaru	Impreza	GR, GH, G3	2.5 AWD	EJ255	Hatchback	All-wheel Drive	Petrol	2008	2016
  Subaru	Impreza	GR, GH, G3	2.5 WRX S AWD	EJ255	Hatchback	All-wheel Drive	Petrol	2009	2010
  Subaru	Legacy	BL, BP	2.0GT		Estate	All-wheel Drive	Petrol	2003	2006
  Subaru	Legacy	BL, BP	2.0GT