hey ive just bought my new a3 and i like it alot.
however i know i can get it quicker or at least feel it boost more?
whats the 1st few engine mods i should be looking at?
where can i get it re-mapped and what bhp can i expect?
whats the best dump valve without a silly hissssing noise?
whats the best filter to get?
please help cheers