Re: Exhaust cutaway on rear bumper.
I would just replace the lower cladding with the one from the V8, it will look more finished. That part is not expensive ($150 maybe) and its not too hard to install.
2015 Lexus LS460 AWD, Nebula Grey w/Light Grey Shimamoku Interior
2015 Kia Sedona SX-L, BlackBerry w/ Dark Burgundy Interior
Previous Jeeps: 2014 Grand Cherokee Overland; 2011 Grand Cherokee Laredo X