The compression ratio in turbo engines is less than in na engines plus the pcm calibrations are different plus heaps of other things, not worth it... To get an exemption youl need to proce you need the car for work and even then youl only be able to dive to and from or during work, hiding the fact its a turbo is impossible once the bonnet is lifted plus no insurance company will insure you, buy a cheap corolla to get around in til your on your opens