They have pre-cats aswel, one on each of the exhaust manifolds, and the main cat. i decated my main cat, and it sailed through the MOT with just the pre cats, and i know plenty who have done the same. even if it failed the emissions tests, its literally a 10 minute job to put the cat back on, its only 4/5 bolts, depending wether you have a 2 or 3 bolt flange. being a later one, id bet yours has the 3 bolt flange, but still, it doesnt take long, and decatting them makes a notable difference to throttle response, they rev a lot more freely