I know the modern tuner hates loud exhausts and BOV.. times ahve changed as cars are too damn expensive to be getting pulled over.. but I would recommend one of the BOV that can be turned off and on with a flick of the wrist. Cant beat it! And a nice intake to hear the cold air.. excellent combo.
yeah boi, you can get for example the Go Fast Bits BOV which worked very well on my car.
Otherwise hows your wiring skills?
Get this installed to be able to adjust the BOV from INSIDE the car using an electronic dial.