I assume you where trying to do the Ragnar Cut. Should'a used a hole saw to cut three holes.....one around each baffle.
After cutting the holes, the trick to removing the baffles was to grab them with a set of vise grips and begin with a twisting motion back and forth (not rocking back and fourth, but give them a twist). They do come out that way. Maybe this will help.......
http://luiscajiga.com/Exhaustm.htmhttp://luiscajiga.com/Exhaustm2.htmSince you've gone further than that, I'm not sure about the fins.
I think I've read before that fudgie had cut part (or all) of his canisters off of his pipes. You might want to pm him and see if he has any insights....but he might already be on his way to Sturgis by now.
Also, ask Mark T.....either through here or his web site. If anybody knows about the innerds of the Valk's pipes, I'd guess it would be him.
Here is Mark's web site....
http://horseapple.com/Valkyrie/Valk_Products/M2W_Exhaust__System/m2w_exhaust__system.html