I'm on the search for the perfect exhaust note as well, for my 15 longhorn. at one point back in the early 2000's I had (IMHO) thee BEST sounding muffler for the 4.7L dakota .. this was my 4.7L with a single in/dual out Ravin Z33 muffler and over the axle rear exit tail pipes.
I've had plenty of vehicles with plenty of exhausts.. this was the one that people would flag me down (not just Dodge truck owners but, GM and Ford owners and muscle car owners too) just to ask what exhaust setup I had.
this is the sweet tone that is magic to my ears that I would like on my Longhorn.
in the cab there was very little drone except around 85 - 90 KMH. less than that there was none and above that there was none. they were deeper sounding bit snappier than the horrible old flowmasters (barky and annoying like a dog with bronchitis) LOL
I was soooo sad when Midas sold off the Ravin brand and their design was just dropped by whomever purchased them.
I'm alllll ears if anyone has heard a muffler only or full cat back system that sounds close to this on the Hemi Ram ... mmmm.. I sooo miss it.