Here are most of the parts for the muffler on my Poulan at the time. They are layed out pretty much like they go together. Exaust goes in thru the pipe from the right and into the chamber to the left and out of the holes in the tube. After that it goes thru the drilled round piece in the center. From there it goes into the outlet tube thru the holes drilled into it and out.

Pretty simple eh

Adam