Audi5k

The last three weeks Ive been getting the high pitched noise above 10 psi and my boost gauge isn't reading steady.I checked all my boost line's and charge pipe's and didn't find anything wrong.For thoose who don't know me I have ko4's and rs4 ic's with samco hoses all around and apr bi-pipe.Im thinking it could be one of three things (1)One of my ko4 wastegate accuators is bad (2)An intake gasket is leaking (3) The O-rings on my apr bi-pipe are shot.The car runs fine. No engine codes, just this damm noise and unsteady boost reading.
If anyone can help me please let me know.

ATH

Does this noise sound like a dentist drill? :-/

AJN334

Cause if it does, your turbos are shot.

Audi5k

Yeah kind of...