Muffler options ?....

Put tailpipes on it, send the noise out the back, big difference, and personally I prefer the stock style resonator, to give it the exclusive "Mopar" sound.. jmo.
The man has a point. Tailpipes make a HUGE difference. The turndowns cause sound waves to reverberate from the pavement to the trunk. The trunk is like a huge echo chamber. I had a 2002 Ram 1500 that I lowered. The stock pipe was in the way so temporarily, I cut off the pipe before the axle. Holy crap the truck was annoying!
In my Charger, I went from 2 1/2" pipes and Flowmasters to 3" (With an X pipe) with Ultra Flo mufflers. The sound was MUCH different even with larger pipes. It is almost too soft in tone now but easier on the ears for extended drives.