MOT passable exhaust system

Hi Everyone, I bought myself a 197 f1 edition around 2 months ago it already has miltek cat back exhaust and a manifold installed. Im not sure what brand the manifold is but i know the whole system is catless. What would be my best options to make it MOT Passable. I have the original exhaust and manifold. am i best of reinstalling it although i hear changing the manifold is a ball ache. Or is there a better option such as purchasing a sports cat and welding it in? But would this be enough to pass the MOT? I do enjoy the sound of the exhaust but its maybe a little to loud. I Just want it to be MOT Passable year after year without being to much hassle. Thanks in advance for the responses
 
Hi Craig. I have a 4 branch Gravity manifold with a Scorpion 200 cell sports cat and Scorpion cat back system. No issue passing the MOT. I doubt the cat would quieten your exhaust much, mine is still pretty loud under throttle.
I had my Clio remapped straight after fitting this system to account for the flow changes. You may find you would benefit from a map change, or you may be ok.