What's so special about the Agency Power blow off valve for your 2008-2014 Subaru WRX? Well actually, a lot of things! Agency Power's valve is adjustable with 3 unique settings: full vent to atmosphere (open dump), 100% re circulation back to the intake (like the stock unit) and 50/50 hybrid. (the best of both worlds). The hybrid setting routes half of the air back into the intake and the other half to atmosphere, thus giving you that sweet ole sound. 50/50 gives the WRX the distinct sound but doesn't sacrifice any performance like some of the full vent to atmosphere blow off valves do. (Engine bogging can happen with full vent to atmosphere, stalling at a stop sign. No one wants that.)
Agency Power manufactured this 2008-2014 WRX blow off valve using T6061 CNCed aluminum in the good ole U S and A. The top of the valve features the AP logo engraved as well as settings to make your adjustments with the valve (thus increasing or decreasing the spring load). The spring rate is manufactured to the correct pressure to allow for adjustments from stock to aggressive boost levels.
Agency Power includes all necessary hardware and instructions to easily install this to your Subaru WRX on an idle, boring Saturday morning.
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Subaru WRX Hatch and Sedan 2.5L, 2008-2009-2010-2011-2012-2013-2014