If I’m understanding correctly, it is to catch any oil and debris to limit or prevent that stuff from entering the intake manifold and potentially the engine. I have been wondering about these as well and curious if just a high quality air filter that is either replaced or checked and clean often is good enough but I haven’t gotten that far into the research. I have a different warranty than Mopar and there are different ways I have to go about what I choose for my add-ons.
An update on the rear sway bar though - and there are areas where the speed limits where I drive on the highway are 70, 75, and 80. So please no lecturing on slowing down because I hear enough about that from my wife.
There are areas where I normally need to let off the throttle or tap the brakes on certain winding parts of the highway that I took with ease and was able to keep the cruise control on at 84. I was very surprised and it gave me more confidence that I made the right choice in the purchase. Next, I look forward to going through the big group of roundabouts one after the other that I normally find extremely annoying.