May be a stupid question but what is the bore size of the 1.6 16v exhaust? As I have my cat back but I'm going to decat my car and put a silencer just behind where the cat normally sits.
sorry to jump in, but just in case you haven't seen his thread, sly si is selling a decat pipe already made with a 3 bolt flange so will bolt on and off for MOT day if you are after one.