It sounds like more air is rushing in with a hint of a whistle, but it's very loud and getting progressively worse. Just started happening about 4 days ago out of the blue. The only mods that would have any effect on it would be Stage 1 on the AP, everything else is stock. There seems to be no loss of performance that I can tell, and almost hitting target boost for that map. Checked all the hoses and felt for any air leaking and couldn't find anything. Air temperature doesn't seem to make a difference, was 30° when it happened, and got up to 60° today.
Took it to the dealer and drove it with one of the mechanic in the car and they heard the sound. They are were very useless and clueless, they guy said it could be something with the supercharger... I'll be taking it to a different dealer tomorrow. Thoughts?