We tow a 3500 lb converted cargo camper with our 2023 XLT FX-4 (2.0 L) with 4K...
After the first summer, added 1000 lb capacity air bags to the rear coil springs...
Made a HUGE difference... mostly in the "floating" effect you often get, and a lot less sag under load.
In Tow Mode, you have no...
Actually that comes in very handy for getting things in and out of roof basket... and has actually saved us some money when someone got a little too close when parking... 😉
They are from Overland Racks Ontario, and are half aluminum, and half powder coated steel. I'd contact Sean and see if he could do 100% aluminum, which rules out rust.