I used the dynomax super turbos @2-1/2 inches, offset in center out, full tail pipes. My ‘03-5.9 was basically stock except rpm intake, 600 carb, headers into a true dual exhaust to the bumper.
I found the sound quietly muscular at cruise, noticeable when I’m on it, quite at idle. It seems to suite the sedate build of a true Mello hot rod cruiser. That’s what I wanted. Something to drive anywhere at anytime for any distance while enjoying music.
I tried several mufflers. (There inexpensive enough) I also tried;
Hooker Asro Chambers. Louder and states muscle car.
Summit turbo mufflers tha came with the exhaust kit. Louder still yet. Slightly annoyed at the sound level for strictly a cruiser, powerful sound.
Dyno Max VT My ears said “OUCH!” LOUD!!!!
