I see you have a 2018 model , you should be fine then as what i'm talking about applies to 2011-2013 for what i see in the Motor city mechanic youtube page. I still have that doorman part somewhere in my garage even though i sold the Jeep couple of years ago.
I never did mud cause i hate that crap with passion so only rocks and dirt
, it wasn't that bad just had to be aware that there might be a lot of dirt around the area so i tried to blow it all up with compressed air making sure i had a couple of rags around covering the alternator just in case. Easier to change the filter that way compared to the Hemi.