So after a bit more reading on the forum it seems most of the catalytic converter is in the silencer and link pipe if I understand things right so leaving what's left in the collector box probably doesn't serve much purpose emissions wise although I admit I know sweet fa about this.
Question is is there anything to be gained by removing what's left, a post last yeah ended without much conclusion on the matter. It must have some restriction effect as it is to a point reducing the space in the tube but is it noticeable either on power or noise on a un ivanised bike or an ivanised bike for that matter... those of you who have removed it why did you do it?