I have the stock decatted header and Fullsac baffles in the mufflers. Sounds healthy but not ridiculous for long trips. I definitely wouldn't want it any louder, though.
My bike is a 2020, but I'm using the heat shields from a 2018 CVO since they are gloss black. It looks fantastic against the motor and the clean up like new even after going weeks without cleaning off dirt/mud and even salt. HD heat shields in general are very robust which is why I went with this system. D&D, V&H, and S&S have all been junk when it comes to rust and discoloration. Maybe companies with "&" in the middle just don't hold up well 
I did the same thing when I traded my 2017 to my 2019.
My 17 mufflers had the Fullsac treatment and I swapped them with the 19 before delivery.
I had plans for my new 19, and this was just the start.
I’ve still got the same packing in them from 2019 and 99,000+ miles.
I’m pretty happy with the reliability of my complete Fullsac header and muffler setup.
My exhaust system now has more miles than my bike! LOL