i preface this question by saying my VT has no mods and only 400 total miles on it........no sure if this is a GDI thing or not.....i noticed today for the 1st time that while on the express way attempting to pass someone the turbo was spooling building boost and making an unusual sound that sounded like a playing card in the spokes of your bicycle. It goes away under full boost... I may not of noticed in the past as i was always driving w/ the radio on. Now i'm obsessed w/this noise as it sounds like the turbo wants to swallow a piece of paper....not good....i have owned a MKV gti and had a bad recirculating valve that made a similar noise under boost....I set an appointment to check it out as i feel confident i can replicate the noise.....Any one notice else notice this??