This is from another forum...a least this person is indicating GFX is a Line X company, so it could very well be a Line X product that maybe isn't sprayed as thick or have the lifetime warranty.
When your Ram 1500 is finished being built, it is trucked over to a place in Warrrn Michigan, called GFXltd, Ground Effects Ltd.
They do Spray ins, side steps, Hitch Receivers, & anything else that is added on before being shipped to your dealership
GFX Ltd, is run by a Line-X company
https://www.gfxltd.com/
&
http://www.gfxlaw.com/ <--- law enforcement vehicles