[Gogud]

Here is a mod whose main virtue is its low cost.


It would be interesting to view the internal structure of the muffler to see where passageways between chambers could be opened up and/or shaped pieces introduced to channel the flow. If the goal is to reduce backpresure without rigid sound level constraints, most likely a hobbiest could handle it. There are plenty of stock mufflers out there now with little demand for them. Someone could cut the seam on a few and experiment with the internals until the right combination of mods is found. This would be preferable to making external changes and could turn into a nice little sideline for someone.