Yeah Taylor said its the valve flapping open and closed under higher boost. To someone who's never heard it it really does sound terrible. I guess if its normal and the car was tuned for it I will keep it for now. The exhaust is also stupid loud, so may I need to save up for a new exhaust, back to duals, re installation of the 3port so it doesn't do it, and a tune. Just seams like a lot of coin to fix something that isn't broke but I just don't like.