M3W's fall into Class IV for MoT testing regs here in the UK...this is the same as a family hatchback etc so emissions testing will be indentical.

Take the cats off by all means, but don't bin 'em..!!

More here if wished:

http://www.motester.co.uk/mot-general-information/mot-information-for-motorists/what-is-the-mot


Steve