Thanks guys
Great advice here.
One cat each side might just work enough but my exhaust man is suggesting if he fits the lambda at a 45deg angle or moves it further out of the exhaust air stream then it will read a weaker mixture.
Not too worried about a light although a pain. Just didn’t want it to try and alter mixtures to compensate but from what I’m hearing it only throws a light.
I have. Librands system with the under sill silencers effectively piped through so just running the cats and rear in pipe resonators to silence it. It’s still fall to quiet.
I might take a cat off and get a pipe made.
Will report back.