Just got my 2002 S3 home on friday, delighted with the car needing to tidy up a few bits first but then am looking into tuning it to stage 2.
I know so far that i need a cat back exhaust, air filter (does this have to be a induction kit or just a panel filter?) do i need anything else? I have heard about valve bypasses but don't have a clue what they are or what the do?
Any help would be appreciated, also Star Performance are probably the closest tuner to me just wondering if any one has dealt with them?