The Ford F-350 Super Duty XL is a truck driven by Neil Kandy.
After splitting the Todd's money three-ways with Jesse, Neil puts his and Casey's share in his truck. Jesse recognizes the inscription on the door, and remembers Neil from when he installed the ramp Jesse was shackled to in the Jack Welker's meth lab. Jesse later spots the truck parked outside Kandy Welding Co.
It is also seen in a flashback when Neil installs the ramp for Jesse to be shackled to while cooking meth at the White Supremacist Compound.