here's what I do, this style Poulan is super simple to modify the stock muffler as it's only held together with the springs, just take out the two baffle plates in the middle, weld up the stock outlet and grind it to look like it was never there (takes a little time with the Dremel), cut a hole or two for the outlet tube(s), I use tube from a folding camp chair, and enlarge with a chainsaw file and weld in place from the inside for a clean look. I use the MIG welder at work and just use a LOT of tack welds to do it, I've done it with my little 110v arc welder turned way down with 1/16" rods but it's a bit messier and takes a LOT of patience.