Well I took the plunge yesterday as I really wanted my S3 to sound more meatier and drilled some small holes in my airbox. (http://www.wak-tt.com/mods/ramair/cheapinduction.htm) Also cleanned out my green panel!
I did these on the front and the bottom. I was expecting a bit of a loss of performance to be honest but was prepared to sacrifice that. Anyway drove to bedford last night on some dualys and my goodness what a difference. It didnt make it much more louder a little, can hear the DV a bit more. But my days does it pull better top end, was really surprissed by the difference! Throttle response was better to.
Although I took the oppurntunity to smooth out my airbox to while I was at it i.e taking out all the ridges at the bottom with a plastic cutter so not sure if this the reason. Anyhow im chuffed to bits - im sure im gonna slated for doing it and by told it's all in my head but I honestly can feel a noticeable improvement.