I have just fitted a set of scorpion exhausts to my xtx and in one of them the baffle has a cap on the end of it while the other hasn't and you can see all the way through the can. A mate says this is normal to keep pressure in the system but I have no idea if this is correct or not.
Oh and a quick thanks to you kev for your advice on maps for my power commander I finally fitted one of the custom maps you suggested and took the bike out for a spin, its so much better! Almost zero surging and with the new exhausts fitted it sounds awsome! What a bike!