Another way that some of us have done is removed the whole baffle assembly. To do that you have to drill out the welds on the back side of the pipes (1/8 bit) then take your brackets off. After the brackets are off you'll need to remove the cups that they were bolted to. That'll free up the baffles from inside the pipe. To get them out you'll need to grind the lip off of the end of the pipe. You don't have to cut the pipe just grind the lip where it returns in. Then to get the baffles out you need to grab a long pipe or axe handle and pound them out. They are in there pretty tight. Once you get the old baffles out you'll have a wide open set of pipes to do with what you want. I added some aftermarket baffles to mine. I just wouldn't run them wide open like that though. There should be some back pressure.
