What is the stock size of the exhaust pipes, I would like to modify the exhaust?

I’m thinking 2.25. The car is brand new, and man does it have power for a V6. 0-60 in about 5.9 seconds but sounds like a baby, lol. I would like a deeper tone. I thought about doing a rear resonator deleting but fear I might get a drone sound. I have true dual exhaust with 2 4-inch tubular mufflers in the mid-section and two resonators near each back bumper. Would replacing the stock mufflers with Flow master FX be a good idea for a deeper but not fart can sounding option? I have a Hemi 5.7 Ram so I’m not trying to make it sound like a V8 just a bit deeper tone as it has the power already. Attached pic is the two front mufflers. Thanks