Hey I just installed a PW tmic for my MY00 WRX. I get a whistle/whine noise aswell when boost hits or just before.

We re-used my gasket for whatever is on the front right side of the tmic (when looking from the front of the car, i guess its the bov exit or whatever?) I though if the gasket was leaking it wouldn't be all that loud but it's quite hear able from inside the car. I'm going to buy a new gasket from subaru early this week anyway. How, or why, could my bov be sticky like yours jedi luke?