The TurboXS RBV Blow Off Valve Kit is specifically designed for 2002-2007 Subaru WRX and STi's, but will also fit the 2008-2021 STI and requires no adapter kit to install. Gone are the days of buying a Turbo XS BOV and Turbo XS BOV adaptor plate.
It is designed for people who want to run high boost levels, but still vent their BOV back to the air intake to maintain maximum driveability.
DOES NOT WORK WITH TURBOXS VEHICLE-SPECIFIC ADAPTER FLANGES. ONLY FOR 02-07 WRX OR 04-21 STI.