Catalytic Convertor for Devil Exhaust

My Williams is running a de-cat Devil exhaust system, however it will be due a MOT soon, and therefore will need to take the de-cat pipe out and put in a cat.

There seems to be a variety of pricing for this, but i want to make sure that if i buy one of the cheaper options that this will suffice for the MOT.

Also, as the car was fitted with the Devil exhaust when i bought it, i am unsure of the size of pipe for the cat. Does anyone know if the standard cat would fit, or if i would need a special part for this exhaust system.

I have seen a few 100 and 200 Cell sports cats which are pretty pricey, but I am unsure whether to go this route or not.

Any suggestions?

Borrow or buy an old cat, if you struggle, widen your search for a valver cat & get the flange chopped off & welded back on in the right position so it fits. Failing that ask if the MOT tester can be "persuaded" to be creative with the emissions test :wink: