Looking for recommendations for a quiet performance muffler...

[Ceeten]

Another vote for the Spintech mufflers. I had a set on my 86, and will run another pair when i get it going again. I used mid-length headers, x-pipe, 2.5 inch pipe out the back and it sounded awesome. Very quiet in the cab but had a tone similar to the old 5 liter Mustangs with aftermarket exhaust and off road h-pipe. I think the reason they don't "drone" in the cab is because they are built like tanks.