Fiesta may have a big cut out for the exhaust, but its too big a pipe for such a small car. But it defo does suit it better than the 3.5" one i took off a fiesta rst a broke recently!
The cossie however deserves a large tailpipe in my opinion. Not silly jap sized like 5" etc. But just a nice lout/yob sized 4" one. Lol.