I'm guessing you have the older style pipes. (fully welded) You could sell these and get the newer style pipes from Kirkham, The new style pipes use mufflers from Burns and can be disassembled. This would make it easy to install and remove either baffles or screen cones in the pipes.
Actually, we use Coast Fabrication mufflers. You can quite down the car quite a bit if you use a 2 1/2 inch muffler instead of the 3 inch muffler (ID).