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The GFB Respons blow-off valve for 2008–2010+ Subaru WRX and 2005–2009 Legacy GT lets you infinitely vary how much air is recirculated or vented to atmosphere. Twist the adjustment ring to change the venting bias from full recirc (silent) to full atmosphere (loud) and tailor the sound without causing drivability issues. Respons uses GFB’s TMS technology for rapid boost recovery and improved throttle response and is rated to withstand boost pressures above 100 psi.
GFB 08-10+ WRX / 05-09 LGT TMS Respons Blow Off Valve Kit
