They don't half talk some shit on there don't they.
Down on power so check a few vac pipes then come to the conclusion it must be the turbo, and its blocked the cat, when it didn't even smoke
Id like to have the car here myself for a set up, and see what was really wrong with it, its probably still far from fixed
If the part where they showed the "bar pressure gauge" while they were showing how fast it now was is anything to go by, its still only making about 5lb of boost