Gone are the days of buying a Turbo XS BOV and Turbo XS BOV adaptor plate. The Turbo XS RBV for the 02-07 WRX & 04-17 STi Blow off valve is one piece and comes with a new BOV gasket, so the base can never leak again. The design has also been altered to make this BOV connect directly to the WRX or STi's stock recirculation fitting allowing you to get the performance from this BOV without being forced to vent to atmosphere, which can cause backfiring on MAP based cars like the WRX & STi. All in all this Turbo XS RBV BOV kit for the WRX and STi is the best we have seen from Turbo XS as far as Blow off valves is concerned and it may be the best BOV on the market today for your WRX or STi.
DOES NOT WORK WITH TURBOXS VEHICLE-SPECIFIC ADAPTER FLANGES. ONLY FOR 02-07 WRX OR 04-17 STI.