noob questions
 

wats up just got my a4 2.8 1997 but i have no clue about anything on this cars exhaust...or the intake..i wouldve thought just go and install a magnaflow double tip and im set but i looked under and see a metal piece that wouldnt allow it....the intake has a bunch of sensors so im scared to just take the stock box out and put in a filter...any suggestions..im new and lost lol