Thanks all. Richard I think you are right - it does look longer than the one in the photo, as the body of the silencer starts before the firewall. The vhpd one does look it might fit though, but not available of course. Modifying mine might be the cheapest option - do you have any suggestions on how? At least I would know it fits! I have seen the 'motorsports' cats on demon tweeks, and perhaps could cobble that onto the inside of mine. Or find someone who could fabricate me the whole thing. I will see if the previous owners have it, but I suspect not.