COBB Tuning XLE BOV (02-07 WRX, 04+ STi, 04-08 FXT)

The Cobb Tuning XLE By Pass Valve (BPV) is a lightweight and strong valve which was designed to hold high amounts of boost unlike the stock unit. This is designed for people looking for the person looking to keep his/her car's ECU happy. 

One of the cooler things about this valve is that your able to adjust the spring tension which means that your able to adjust when the valve opens depending on the application or how much boost you are running. 

The valve can also be run in 2 configurations, a full recirculating unit or a Hybrid which will release part of the air into the atmosphere at the top 50% of the piston stroke. Making it ideal for just normal driving with no downsides, and allow for all the air to escape rapidly when driving the car hard.