Cool so either just get a standard back box orsomethin tha will fifit tthe pipe lol
I don't have a front cat and have removed my rear silencer altogether with a side exit.
I never noticed any difference when I took off my back silencer reagrding noise - certainly not any noticeable increase, but like you noticed a lot when I took out the middle silencer, so have replaced the pipe with a scentre silencer from a 200 I found in a scrappy
Back to a nice sound again.