GrimmSpeed V2 Recirculating BOV 2008-2014 WRX

GrimmSpeed started from the ground-up design with the valve body and base for each popular fitment. Both are CNC-machined out of billet 6061 aluminum alloy for its strength and light-weight. They are then anodized in either a black or red finish to give them a brilliant appearance, provide corrosion resistance and match other GrimmSpeed offerings. Compared to the plastic construction on both the 2008-2014 WRX, GrimmSpeed Bypass Valves not only stand out, but are guaranteed to stand the test of time. For the internal components of the valve, GrimmSpeed chose to utilize a machined brass piston for its anti-corrosion and low thermal expansion characteristics. Our piston seats onto an internal O-ring to create a perfect seal, eliminating boost leaks common in OEM and cheap aftermarket BPVs. In order to make sure this could keep up with high power levels, a massive 38mm diameter piston/sealing ring is used to dump pressure quickly. This is especially important on high boost applications to