A fellow london tunnel runner drives a 355 with a de-cat capristo stage 3 and its monster loud. I was behind him when he got pulled over a few months back, the police made him aware that there was a 75db limit in Kensington at night and that he was easily breaking this. Then they admired his car and sent him on his way. I doubt any police carry emmision testing equipment with them anyway. Do you know of anyone who's been done in the UK?
I don't think our plod look at it the same way as they do in Oz. You're more likely to be pulled up here by the tree hugging police for slowly killing the planet one mile at a time ;-)
my worry with a decat, would not be a fine, or a police order to put it right..
more along the lines of insurance company using this as a get out of jail free card,
eg if you have a prang and they won`t pay out as your now running an illegal car?
so can you declare a DE-cat as a
mod to a road car,

if not, you may as well be a 15 yr old asbo in a saxo if some idiot drives into you