so i got a 2001 2.5RS and it needs a new cat. i have no idea what to get here. but i thought that if i have to replace one thing, might as well replace it all, right? so what should i get here? i'm looking at a header, high flow cat (i guess?), and a cat back exhaust. help please.
Borla header Stromung HFC Stromung catback - I think the dual tip looks great and sounds just as good.
if i get the borla header and the stromung HFC, will they throw any CEL codes without tuning of some sort?