not sure if in right section but just bought a 2009 MS3 GT and wanted to get blow off valve but heard it needed to be set up as recirculating just wondering does it still give off that wosh sound with that set up or does it only make that noise when vent to atmosphere. any help would be greatly appreciated

 

If you get a CAI/SRI you will actually be able to hear the stock BPV. If you still want to change, you need either a BPV or a hybrid. I'm running a Forge and like it.