Quietest performance muffler

I had a 3" single Spintech on my Dakota R/T. Ditched it for single 3" 18" body Magnaflow. Much quieter with the Magnaflow. Then when to dual 3" Magnaflow ( still 18" bodies). Even MORE quiet (until you get on it, then it's a nice deep rumble). I'm currently running the 14" Magnaflows on my Scamp.