I have a 3" X pipe system, turn downs after the axles, and 3" Magnaflows. No drone, not overly loud at idle and cruise, but barks when the pedal is down.
I made a little comparison video a few years back when I had switched from Flowtech afterburners to Magnaflows. The afterburners did have resonance, but that was gone once I installed the Magnaflows. The afterburners did have a cool classic sound though.
