was thinking of doing this myself but im going get hold of an old cat pipe open it rip everything out then weld it back up. 
that was my first plan but for £40/£60 pounds you can get stainless pipe , and mine used to stutter in second gear when changing at higher revs , it doesnt now sounds better and gos better , glad i did it , even thou the m.o.t is next week , gonna blag it thou fingers crossed tthe emissions wont be stupid
