There are two (2) removable baffles on each side. Drill out the rivets on the bottom to remove. I cut the end off of one re-installed. Jimmy has a tool to remove them or you can make one yourself like I did from parts at the hardware store
I rode it without any baffles and it appeared to not perform as well as it should, lack of back pressure. Hard to say how loud it was, but it sounds great and not too loud. I like the sound and the fact that the bike can breathe without the cats which I had ceramic coated
You guys are funny. The catalytic converters are not the pellet type of the 70s and 80s that restricted a lot of flow. The current catalytic converters flow so well that removing them does not add usable power besides 2-3 hp way up in the rpm range. Many have found a loss of torque at the more usable lower rpm range. Plus there is no stink nor rasp when left alone.