hi guys am new i this forum
today i got my audi 08rs4 its daytona grey its a nice car

so now i wont your help plz

what is the best cold air intake ??
and
what is the best exhaust system with the headers

waiting for your replay

 

welcome, I know nothing about the B7 RS4, so you should proably post these question in the RS4 forum so someone can help you who knows a bit more.