AMDRS6 mentioned a 'whooo' under throttle in his 'Beasts' posts. My RS6 started the same noise just recently, so I figured I'd start a thread. I talked to Addict Motorsports and they weren't sure what it is, but knew of a different RS6 with the same noise. They'll check it out the next time I am in.

Anyone have an idea of what this is?