It's that spool down noise he wants that comes through the exhaust. Pretty much the sexiest sound a turbo'd car can make IMO. Almost every car that has a turbo with exhaust has this sound, however I have yet to hear a mk6 make it....
Did the mk5's have a turbo muffler on their ko3's?i think this could be our problem.
Drove behind a 96 Porsche turbo yesterday, with what sounded like cams and exhaust, and omg.... Spoolin up and down all over. Drove with my windows down the whole time. Lol
And again not to be confused with intake noise. That is spool up you hear when boosting. This is a sound that can be heard when in neutral, low rpm revs, no boost.