So I finally had some time to conduct my "experiment" today. This is what muffler deletes sound like for the 2015 V6. Drone is definitely present so I think some resonated tips or a straight through muffler like the race bullets are needed to tune the sound and remove some of the drone. This thing is quiet at idle though... Almost to quiet...

Idle and rev:


Drone video:

 

If I were you, I'd put the mufflers back on and cut the suitcase out and have a shop weld an H-pipe in...