HJ, There are some good pictures of OEM baffles that have been removed somewhere on this forum, The OEM pipes have two overlapping tubes, the inlet tube ehausts toward the rear of the chamber reverses Direction and exits via the outlet tube opening at the front of the chamber. I have been tinkering with them and many other style baffles over the years, Hole saws, surveyors stakes, Cutting torches, Saws, shortning baffles , removing Cats, Etc and the best sound I have been able to achieve is a tinny,
chirping trashy sound, Steve at Fullsac has put together a nice perforated baffle that fits our SE CVO pipes perfectly, Sound is very subjective, but to my old ears ,my 1 3/4,s have a nice muted rumble and sound as good or better then pipes ive tried costing 5 times as much. IMHO there is no one muffler that can do it all, some sound better at idle, others while under a load, and some at x-way speeds, for a very minimal price the Fullsac cores rank very well.