gonna do away with the cats on non turbo import,

but not sure what the wiring is that is connected to them

also where do there join on downpipes or are they part of it

thyere is also a pipe that is attached to the downpipes.

i am thinking emissions here or what can they be done away with.

also the back tyres are wearing on inside ,any ideas

If you are talking about the ERG wiring that ususally plugs into the cats, then you don't need to connect this to the zorst at all.

 

If you search for cat or emmisions then you will find loads of information on the MOT etc. So you shouldn't have any problems there.