I can't speak for an 8v.
But Tinman, you really do talk rubbish.
Read my earlier post about using stock air box, induction kits, and drilled air boxes.
On a vr6 it does make a difference, its not just because 'i think' its better.
my main issue regarding these upgrades is that the owners take off an old manky part - and stick on a new part and then claim a performance increase becuase of the "performance" part, when in actual fact, putting on a new VAG part would of got very similar results.
there are books that even show this with evidence to back it up. the one in mind used a Mk2 16v as the mule. the end conclusion that all these performance parts did virtually nothing for the car.
my other issue is that people put on these performance parts and offer no evidence to show better performance, apart from "it made my car go faster".
i have also seen cars that have had no K&N, and then the results with K&N - and the difference was negligable. And this was one two cars about 2 years old. the only thing the K&N did was make the engine louder and increased fuel consumption.
I've seen cars where people managed to put K&Ns on and damaged other components on their engine.
so I'm sorry, espeicially when it comes to K&N - there is a lot of mickey mouse physics going on, and depserate people trying to justify their "performance" part.
at the end of the day, it seems fairly clear, if you want a faster car, go buy one. or do what Dizzie did and stick stuffing great big engine in. but dont go to DesperateDubs or whatever they are called.