my exhurst is pretty much like this one, except its made for the micra. its about three inch dia (just fits in the hole in the exhurst). with no real baffle. its VERY load, its a bit too loud. but my dad got it from a scrap yard when it was his car so i got it free good luck, hope it works mate.
hope your sterio is good though
Well first I chopped off my exhaust and stuck on one from a motorbike, then replaced that for a cherry bomb.
Now I am shoving a pipe which is made up of a piece of scaffold pole and a hobby welder gas bottle. Which will kkeep the same volume but give me a deeper roar.
I'm also considering central exit.