Have you got a y piece fitted on your bike or is the cat still there? if you want your bike louder i think you'll be dissapointed by changing the can with a cat fitted, a stubby just bolted to the cat gives a louder noise but not that much and the cat is actually stamped with a bs number meaning it's technically legal to run that as the silencer on it's own. That way you dont butcher the bm can and can re-sell it at some point and you have no probs with the pannier.
