Garage has gone over the exhaust system and said it is potentially the cats breaking up, nothing loose or broken externally. I have had a look on the Crossfire Parts list to identify what replacement parts I will require. Can somebody please confirm if I am right with my understanding?

If its the cats, am I looking for items 1 & 2 from the diagram plus items 6, 7 & 8?

I had always assumed the cats came as single items for each side and were just bolted into place, i.e. no pipework came with them.

Many thanks
Mark