So i was givin it some you know, and i heard a pop. Its the same kind of pop you hear when the intercooler pipe pops off but it was the intercooler pipes, ive checked all of them. Wasnt anything with the intake or bov. The turbo does sound a bit louder now after the pop, but mostly just the begining spool. I did a boost leak test and no major air was getting through anywhere.

What could it be?