2 things concern me
1) the intake to the turbo inlet is sooty, and grimey, not BAD, but one would assume it would be clean with a filter
2) the inside of the throttle body, after the butterfly valve has black slimey substance on it... now i know bad turbos put out traces of oil through the FMIC and piping etc, but is that just normal wear and tear from a boosted motor?
its a sr20det from a silvia s13 btw.