after a new exhaust? have a read here first

[sinto607276]

thought silencers have to be tailored made to suit different bikes?

Lots of silencers (end cans) are interchangeable if you can get the correct size to connect to the link pipe it shouldn't make a difference, (and the hanger should just slide up or down the silencer to fit in with original hanger place)
It's the downpipes and link pipes that you really need to keep to original specs etc although these could be changed too if you wanted to route the exhaust a different way, ie to the other side of the bike but that would involve a lot of measuring and sorting out