No, not the ones Satan smokes but the ones you put on your bike. It went on quick as you like after removing the standard titanium[1] can and the whole job took less than half an hour[2]. I haven't started it yet. I'll leave that for the maiden voyage<G>[3]. [1] Which doesn't weigh a lot more than the carbon fibre item I replaced it with. [2] Spent more time faffing about lining it up than any spannering. [3] I took the liberty of removing the road-legal baffle. To keep it in would be sacrilege