So I have a driftmotion greddy type s knock off bov in the location of the stock bpv. I have the spring inside all the way soft but can still hear compressor surge through the air filter. Has anyones had this problem? It seems like the stock location is only good for the rear turbo and doesn't really relieve that much pressure on the front turbo. Is this a bad location to have it? I just don't feel like buying piping or an adaptor to put it on the charge pipe. Let me know your input and what I should do. Thanks! - Ryan