I was running a Cobb OTS tune while waiting for my custome tune date while running a catless DP and was having overboosting problems for obvious reasons, but after a while I started noticing a high pitched repetitive chirping noise mid pull/ at high boost pressure usually in 3rd or 4th and sometimes 2nd, not like one chirp but more like 10 in the matter of a couple seconds. I assumed it was some sort of boost leak as I noticed a very slight decrease in power when that noise occurred and decided to take it in to get it looked at the day it was getting tuned. The shop said there was no boost leak and tuned it and my overboosting problems went away, but driving home I notice the same sound and slight power loss. At lower rpm shifting I also notice a bov flutter so I’m assuming something is up with the BOV. I haven’t seen anyone else with this sound so if you have any ideas lmk and apologies if this is a stupid easy fix or common problem.