markski, mine does sound like it needs modded wastegate valves. I just wanted to be sure and not chase this around. giac stage 4, k24, headers, exhaust, cone filter intake, forges etc,. the dealer ship here in germany says the puter in showin intake values exceeding parameters. But this occurs when I get on boost , it peaks very fast and flutters at 1.1-1.2 best way to describe it is if I had more restriction in my intake it would give the puter time to "catch" up

 

I didnt know ur in germany.
but does it cut the throttle off when this happens... does ur boost guage bo back to .8 bars or less for a moment?