I am looking at getting a milltek downpipe and sports cat to attach to my milltek non res cat back..
Couple of questions. I have a 3" cat back. Does that mean I need a particular sports car or is the 3" at the other end? Also would I need to worry about errors? I read about cels and not sure if this is something I need to worry about?
Lastly I apologise if I come across a bit dumb haha