Bump on this, reinstalled my stock BPV and its such a b**** to get it on, that I feel i may have misaligned it somehow, or the spring wasnt sitting right or any multitude of things going wrong putting it on. Boost seems normal, and no surge as far as i can tell when off throttle from full boost. also, with the stock BPV on, is it normal to not hear it AT ALL, I seem to remember you could kind of hear it in the car, but now its completely silent, or am i just used to hearing the BOV?