What the best size exhaust can do you use ?. (dia x length)

I am just at the point of trying to decide the layout of the system, and would really appreciate a guide line to work with that's large enough to get through the noise restrictions.

Or does anyone know the size of the stock can on a ZX12r ?

Cheers
Tris

[Edited on 26/8/10 by Tris]

Size of stock one is

520mm long (can part).
150mm dia.

Martin

approx 60 mm in pipe /out die like a muzzy can or a ackrapovic both are not very cheap lol

[Edited on 26/8/10 by imp paul]

Thankyou both - just what i was after