Interesting they capped the baffle off with a solid piece. Forces the flow out and around. Not the most efficient path. Of course, the baffle isn't very long so I can only imagine how loud it would be if you drilled a bunch of holes in it to give the gases a more straight and free path out.
A complete detailed thread on how to ruin a perfectly good muffler. Pics included. I still do not understand why he did that. Some people are overly curious I guess. The slider thing adds gayness to it. HA! :laugh