It is one of these Ronnie:
http://cgi.ebay.co.uk/Honda-Fireblad...item2ea9a41ecc
Obviously not for that price either.....
It also had the extended outlet with rolled edge, although it has come a bit loose now. It has the same 3 bolt flange with a 50mm inlet, had to move the bracket for the roadster but the can itself works fine.
For the Zetec, same for CVH, i used a Focus ST170 4-2-1 and modified to fit. Is a high flow exhaust and works a treat, also a bit quieter with the less restrictive manifold.
AndyH