exhaust question, please help

[upsoluteSTi]

Bought my sti 03 about 3 weeks ago altho the dealer did kindly put the scooby thru an MOT for me. But the problem i have to face with is next year MOT. my car has been de-cat with buddy club exhaust system or just a back box i not too sure. Anyway, what do i need to do to get my car to pass the MOT. Its good to know early so that i can hunt for parts i needed and store it when the time arrive. I have no previour record of any modifications on the scooby apart from a dyno print out with ecutek from local performance centre. If i want to change exhaust system to something else which section do i  need to chage so that it wont damage my engine? Any help would be much appreciated.

[Guest AlanK]

Either a friendly garage (there are lots, sure someone will let you know by phsycic connection  if you you say where you are) who will park it next to a standard car for the emmison test or a standard downpipe will sale the MOT (think just the centre section may in fact do it but DP certainly will)

[upsoluteSTi]

im from aberdeen, so anyone know any mot friendly please let me know. would be much appreciate. my car is 2003 model do they have cat in centre section?