I am aware of people who de-cat new cars as they have the three year period (soon to be four if you follow the gov's recent crap review of the MoT process) and enjoy the additional fun. Given the rules around car exhaust volume now in place it needs something to provide aural enjoyment. How the Aero dual sidepipes ever pass is a mystery to me.
Once into MoT they are getting very fussy now. A couple of GTR owners I speak to have a section of the exhaust made up where the cat has been removed. Each year prior to the MoT they slip the cat back in and take the test. Once approved it comes back off and the blank is fitted again. The engine map is selected for no CAT and the thing sounds just naughty. One did try and get buy with a hot engine and tight engine map but it was failed.
