Magnaflow or Mufflex will sound better.
Put why not replace the stock y pipe while your at it.
It is a real performance robber.
On a 04 hemi (345HP)we saw 8-RWHP gain with just replacing the stock y pipe.
I wonder what gains you might get from a 390 Hp motor.
This is a picture of my 2010 stock y pipe.
2014-True Blue SLT,CC 6.4 BOX.
Air suspension,Rambox,Navigation.Backup camera.