I was going to reply to this thread.............
But I have no clue what is going on 
I think its about fittin a cold airbox into a GTI or ED30 and finding results...was rather interested in this thread but i dunno what happened 
....It digressed (as threads often do) into the part a performance exhaust plays in combination with an air intake, and then into the details of a performance exhaust following posted questions. Quite simple really.