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!?.
Universal 20mm inlet, 20mm outlet

Fitment:
1993 Toyota Supra Base
1993 Toyota Supra Twin Turbo
1994 Subaru Impreza Base
1994 Subaru Impreza L
1994 Subaru Impreza LS
1994 Toyota Supra Base
1994 Toyota Supra Twin Turbo
1995 Subaru Impreza Base
1995 Subaru Impreza L
1995 Subaru Impreza LX
1995 Subaru Impreza Outback
1995 Toyota Supra Base
1995 Toyota Supra Twin Turbo
1996 Subaru Impreza Brighton
1996 Subaru Impreza L
1996 Subaru Impreza LX
1996 Subaru Impreza Outback
1996 Toyota Supra Base
1996 Toyota Supra Twin Turbo
1997 Toyota Supra Base
1997 Toyota Supra Twin Turbo
1998 Toyota Supra Base
1998 Toyota Supra Twin Turbo
2004 Mazda Miata Mazdaspeed
2005 Mazda Miata Mazdaspeed