Just oem things, Rockford upgrade, cross-bars, tint, Flaps. I threw on the Nameless axleback (5in. muffler) for the 2020 outback.
You hear a nice exhaust tone when driving. If anything it will sound loud to you but probably not to those around you. With the tailpipe still pointing down and no cone tip, sound seems to stay under the car rather than behind it.