My buddy has a VF30 and when he turns his car off, while the turbo timer is engaged, he says he hears this clunking noise as if something is rolling around in the turbo. He said that while the car is running, it sounds fine. He wants me to find out for him what company actually makes the turbo, and what is their phone #? He wants to talk to them directly and ask them if they know what the problem would be. Anyone on here have any idea what that could be?