That was my instant reaction Christian, but the drop in boost seemed to be far to precise for an air leak which would not get gradualy worse or would it? My train of thought is that it would either leak or not and the effects would be the same every time? Are there any knowns fualts with the EFi inlet?

I'm going to have the intercooler pressure tested as it has taken a knock at some point. Just want to get to the bottom of this ASAP lol.