GFB 99-00 WRX/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/STi MY99-00, B4 Legacy, GT/XT Forester MY98-04

Fitment:
Subaru Forester XT 2004 to 2005
Subaru Impreza L 1999 to 2000
Subaru Impreza Outback 1999 to 2000
Subaru Impreza RS 1999 to 2000
Subaru Legacy Brighton 1998 to 2000
Subaru Legacy GT 1998 to 2002
Subaru Legacy GT Limited 1998
Subaru Legacy GT Limited 2000 to 2002
Subaru Legacy L 1998 to 2002
Subaru Legacy L 30th Anniversary 1999
Subaru Legacy Limited 30th Anniversary 1999
Subaru Legacy Outback 1998 to 1999
Subaru Legacy Outback Limited 1999
Subaru Legacy Postal 1998