Removing standard exhaust (Bros 400)

[davebros]

so I got myself a can and making up the 2 into 1 link pipe but the hard part of the job looks like its going to be taking off the standard can (not downpipes just the end) 
Iv removed all bolts holding it in place but its still rock solid anyone got any tips or trick for getting this thing off.

[oddjob1]

hi
had to do that with ntv years back..big hammer and chisel..wrecked the old one