Here is the 'hogmeat exhaust-boxer audio tuner-Gasket' I made. This produces an exhaust note that seems little changed from stock, except for new components. Refined, yet edgy with more serious promises. The sound is in context with my polished, lowered just enough, Legacy 2.5GT. A heartbeat restored.
Notes:
The 12/2 Romex copper wire part is 3 and 13/16 inches long.
The washers are 3/8 inch and 'thin.'
The slots in washers were first cut with a hacksaw then opened with a Dremmel.
The parts were cleaned, swabbed with soldering paste, and soldered together, making sure the wires were seated into the bottom of the slots. This was done on a flat surface to align parts.
Holding the assembly with the two washers in the thumb and forefinger of both hands, kind of turn outward while bringing the washers closer together. You can see what you get, a perfect gasket.
Install these with the copper wire upward on both sides. This makes a kind of acoustic horn slot facing backwards along the side of the muffler.
The results will offend no one, people will turn to see you approach in low speed situations, and follow as you go by, wondering and appreciating.
My exhaust is catless with stock (modified internally) cans that are always too quiet. Although early hogmeat mods provided the principle, this 'boxer audio tuner gasket' appeals not only to my ear's need for motor sounds, it is also aesthetically acceptable as well. To me, of course.