Any import car where the engine was never sold to the UK market, cannot have a full uk emissions test as its never going to pass. So glanzas and Gts don't need cats. They can only have a basic emissions test which aslong as your car runs okay it will pass a piece of piss. If its being tested as a UK 4efe then it will normally fail due to different emission tolerances. And if the Mot tester is doing that, than he's doing it wrong.