i mean this sounds cool for some obviously deff not me!!! but guys why in the world would you buy a 40-55k car which most of us had to make 75k to buy and do performance mods half-assed!!! it just sounds like you shouldn't own one if you can't afford it and half to uses black electrical tape to make a BOV which is usually a cheap non performance mod (unless you include what it screws up) just audible!!! why risk messing it up when you have a knowledgeable bmw tech in Matt giving an informed statement as to why this shouldn't be done!!! why mess with a 50k car and put some tape on parts for sound that sounds like it came out of my fathers ass after he had his colon resection!!! just buy a damn BOV if you have to!!!