Originally Posted by Nd4spd1980
"The BPV's also tend to leak at higher boost pressures. "
Would this make an 09 run ****ty at high RPMs in 3rd-6th gear?
Its possible, but somewhat unlikely. What are your current mods and are you tuned for them? What exactly is happening?
Edit: you must have an STi, you don't have the same leaky plastic bpv that the WRXs have.