hey man, just saw your other thread:
which lead me to search for this one... so, subaru DID give you the warranty after all? did you leave your intake on when you took it in? you have an AP too, i imagine? did you leave it flashed? did they sweat you about it?
shortly after buying my used 08 with a warranty, the throwout bearing started jingling, so SOA replaced my clutch under warranty. but the service guy was trying to scare me that they may not replace it if they think i have been "racing" it. at the time, the only mod i had was my rear sway bar. i typically drive fairly gently.
so now i have a cobb sf intake. lately i have been noticing a strange subtle squeaky/squealy noise moments after shifting at low rpm. no codes though. it sounds like it might be the beginning of the same turbo seal issue issue as yours? our mileage is super similar. i was thinking of throwing my stock intake back on, just to be safe, before i take it in. i don't want to be denied the warranty work.