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Home > Intake > Blow-Off Valves/Bypass Valves > TurboXS RFL BOV kit
TurboXS RFL BOV kit - click to enlarge

TurboXS RFL BOV kit


The TurboXS RFL blow-off valve is our loudest and best-selling BOV. RFL stands for "Really ... Loud." This valve uses a special acoustic horn to focus the sound of the blown-off air, and it works. This is the loudest BOV we've ever heard, bar none. Click the link below to hear!

Oh, and it's functional, too. Adjustable spring preload (using included washers) means it can hold as much boost as you want, and it can be set tight enough to not suck in air at idle.

Kit includes the valve, adjustable preload washers, flange, and all the required adapter hardware for your WRX.

Our most popular BOV!

Note: Installing ANY blow-off valve involves some compromise in driveability. When the BOV vents, the car will run momentarily rich. The adjustable valve can usually be adjusted to minimize any hesitation or stumbling, but hiccups or stutters are part of running an open BOV. If you're not ready for this, please do not install an open-to-atmosphere valve.



TurboXS RFL Kit 2002-07 WRXAlso fits 2008+ STI.

K11462WRRegular price: $218.00Sale price: $210.80
TurboXS RFL 2008-12 WRXAlso fits 2004-07 Legacy GT. Does NOT fit 2008+ STI.

06273Regular price: $249.00Sale price: $224.10
TurboXS BOV adapter kit Need a spare adapter kit? Fits all 2002-07 WRX and 2002+ STI (including 2008+).

01339Regular price: $49.00Sale price: $41.65
Other included stuff - click to enlargeOther included stuff
RFL Mounted Close Up - click to enlargeRFL Mounted Close Up
RFL Engine Bay Shot - click to enlargeRFL Engine Bay Shot
RFL Side Shot - click to enlargeRFL Side Shot
Sound file - click to listen!Sound file - click to listen!

Related Items

TurboXS Blow-Off Valve Kit
TurboXS Blow-Off Valve Kit



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