It all depends on whats on there at the moment.I think all the production stuff is pretty crap,so I don't blame you for trying to make one yourself.A photo won't do you much good,the best thing to do is bolt the silencer where you want it,and then make the connecting tube from scratch,that way,you'll end up with a perfect fit.If you get one tube the right diameter bent 180 degrees on a 200mm radius,you'll have enough there to make a couple of pigs ears of it before you make a good un.Easy innit.