header, singular soorry i'm new, i just got my car about a month ago and im 16 so im trying to fugure stuff out about it. Here's some questions they might sound stupid but im new, try to be nice eh?
whats a b-pipe? whats flanged? is it worth it to have my b-pipe flanged? how much will it cost to do it or can I do it myself? and how much is an ex/si cat?