down pipes

does anyone know the size of the down pipes on my bike, what diameter they are I'm thinking of getting some new exhaust's for my bike can see a few that I like but cant see any that really make's me think I want those so I might look into how much I can get some down pipes made for I know the standard ones on my bike are pee shooter size so I'd probably go bigger as I want base line noise more than anything, I've seen two types of end cans I like both made by the same people so I'd have to work to what size they fit to,  2 and a half inch of the top of my head. Talking to a mate of mine there is a place not far from me that does high temp powder coating for things like exhausts would that stop the down pipes blueing/discolouring?  any how any comments/information welcome

You want the diameter of an aftermarket downpipe? the flange as well? I've got some V&H's in the garage I can measure tomoz.

yeh anything will be useful Sim thanks mate the more info the better,  if I can get it done for a reasonable price I should be able to get who ever is making the down pipe's to get it to come out from where it attaches to the engine then flair out to the size I want which I think is two and a half inch I was chatting to a mate of mine who had the same sort of thing done so that he had bigger (fatter) down pipes trouble is I maid the mistake of puffing on a ciggy  he was smoking and didn't really listen properly to him lol I should be seeing him tomorrow so I'll ask how they did that for him again and see what he says lol

Hi Morgan top of pipe o/s 60mm      bottom (pea shooter) 25mm o/s  these are outside measurements.