Just started all of a sudden 2 days ago. When driving, braking, or accelerating (without boost), everything sounds normal. As soon as I step on it enough to get some supercharger boost (doesn't matter if it is a couple or all of the "boost" bars on the DIC) I get what I can best describe as a "flutter" sound coming from the front of the car. The best way to describe it is like a plastic bag flapping quickly in the wind, but louder. My wife says that it sounds somewhat like when a person tries to imitate a cat purring with their tongue, but whatever...
Any thoughts? Performance *seems* to be normal.
Thanks!
UPDATE: There are videos in this thread showing the sound, and it ended up being a large exhaust leak at the flex pipe on the downpipe/catalytic converter.
