I’d recommend staying away from the X4S. I have it and it leaks profusely. Realtruck is claiming it won’t take returns after installation. It’s a nightmare for a $1500 cover. I’ve moved to filing a BBB complaint.
I have the X4S and it's been nothing short of a nightmare. Leaks like crazy along the bed and soaks everything. Realtruck has been zero help. Takes forever to get a callback and they claim that after the cover is installed they don't do refunds. How am I supposed to know it's going to leak...
Just got back from a 1500 mile roundtrip visit to family and my '21 5.0 liter averaged 23 mpg at about 6 mph over the posted limit most of the way. I really couldn't be happier.
Just got my 2021 FX4 Leadfoot back from having my Katzkins with heat installed and I couldn't be happier. Also thought, as a detail, the installer did a really clean job of the heat button install.