If what you're trying to do is to reduce exhaust flow restriction to a practical minimum cost-effectively without creating a noise nuisance for yourself or others, the answer is a stock-type muffler, but a larger-than-stock one.... unless you are racing and turning very high RPMs, the extra flow capacity [of a performance muffler] will be of no practical importance because you'll never use it, but you will have paid for it in extra dollars and/or extra noise.

I can appreciate this logic, Dan. I posted to the other thread you mentioned. But the article wjajr posted intrigues me as well, and has me thinking about the internals of a muffler. It mentions a few Dynomax models (by the way, notice the new "drone free" model at the top there - I'm still not familiar with said drone). Joshua Skinner mentioned his Dynomax Super Turbo - Joshua, where would you rank that model on the noise scale, 1 to 10 (for a slant 6).

I installed the 2bbl manifold and the 32/36 Weber to achieve the possibility of higher gas mileage and performance. Beyond that project and this one, I won't be making any more performance upgrades. Would any others agree with Dan's assessment that a high performance muffler offers zero advantage over the oversized stock-type muffler for someone in my situation?