So when all this 30FF happened, I noticed my exhaust got LOUDER. I have a stock OEM 335i exhaust all the way back. The exhaust definitely got louder when my low boost 30FF happened. Also, I have massive wastegate rattle everytime when RPM drops and it "clanks" for 1/2 second when I gas on it too. See the video below. Everything seems to have happened in the same week.
Is it possible now that the wastegates/bushing are worn out now and it can't hold the wastegate closed. Does an open wastegate cause the exhaust note to get throatier/louder? (It seems like I have a BMW PE exhaust
My wastegate rattling video: