with the standard cat in place it made a nice rumble and a little difference, however when i fitted my 3" downpipe with 100cel race cat, what a difference, decent amount of poke but the sound is awesome not as good as a V6/V8 but still sounds nice, at motorway speeds no more noisy than standardish lol
Here is the sound with standard cat in place:
http://s1117.photobucket.com/albums/...nt=MyMovie.mp4
Simon