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 100 psi plus. 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: SubaruForesterXT2004 SubaruForesterXT2005 SubaruImprezaL1999 SubaruImprezaL2000 SubaruImprezaOutback1999 SubaruImprezaOutback2000 SubaruImprezaRS1999 SubaruImprezaRS2000 SubaruLegacyBrighton1998 SubaruLegacyBrighton1999 SubaruLegacyBrighton2000 SubaruLegacyGT1998 SubaruLegacyGT1999 SubaruLegacyGT2000 SubaruLegacyGT2001 SubaruLegacyGT2002 SubaruLegacyGT Limited1998 SubaruLegacyGT Limited2000 SubaruLegacyGT Limited2001 SubaruLegacyGT Limited2002 SubaruLegacyL1998 SubaruLegacyL1999 SubaruLegacyL2000 SubaruLegacyL2001 SubaruLegacyL2002 SubaruLegacyL 30th Anniversary1999 SubaruLegacyLimited 30th Anniversary1999 SubaruLegacyOutback1998 SubaruLegacyOutback1999 SubaruLegacyOutback Limited1999 SubaruLegacyPostal1998 SubaruLegacySUS 30th Anniversary1999