Does anybody w/ a AEM CAI get a pretty high-pitched, loud, whistle under WOT past about 4700+rpm? I've asked a few people if I have an uber-vacuum leak, or if it's just the mesh from my filter making the noise, and they've all said it's my filter, and that there's no way a vacuum leak would be THAT loud without causing serious problems. I figured I'd ask you guys, just to be safe.

Also, I popped my hood w/ the engine on and started just listening for anything weird, and it seems like there's a slight kind of quiet almost hissing noise near my intake manifold near the back of the motor. Is this normal, or am I just completely paranoid?

Mine hisses too, Its normal.

stupid question, but would that hissing be from the IAC?