depends, get exhaust and k+n thats about it with out 'playing with internals etc' you can get different cams, gas flow the head bigger valves etc theres loads of options also 2.0 bottom end, pending on what model 8v you get you could maybe get 'chipped' think youd be looking around 8-10 bhp with k+n will full exhaust system (if set up correctly on a rollin road) there will be no end of people with more advice, so read on!!!
