Sorry, but where exactly are the cats? I wasn't aware there were cats on these. And why would there be when they are classed as motorcycles and therefore free of smog testing?
Between the Flexi-joint and the slip-on connector for the full pipe/silencer assembly. The CAT section is very slightly fatter tyhan the rest - about 12-14" long I'd guess.
Ahh yes,I see that now on the awesome M3W parts diagram PDF file I was sent, ( I am not currently near my Morgan).
Well here in the US, motorcycles are not smog tested, so I see no reason not to punch out the guts of those guys. It would have positive effect on power and sound. Anyone see a reason not to?