Quote Originally Posted by robby3 View Post
The stock air filters have been choosen to silence the intake noise. It has nothing to do with bad filters at all (Audi filters), they work very well and do their job for sure. Other filters flow more with the same filtration, but you'll also get more intake noise.

Yes, a lot people have problems with free flowing air filters like you had. The main issue with these filters is over-oiling. 7 out of 10 that do the maintenance by themselfes do it wrong.
I agree with all of this.