Exactly what the title says.

Posted the same thing in 1.8t engine forums.

Been happening for a while now. Under max boost and WOT I can hear lite clunking sound from underneath the car. Been driving beside any sort of barrier/wall on the left/right side of me to hear the echo and it seems like it is coming from the underneath the turbo/downpipe location

Searched a lot around here, but nothing with the similar issue. Can it be symptoms of turbo fans failing or cracked downpipe ,or flex portion of it?

Any feedback is appreciated.