The factory 6.7 fuel filter layout works, but servicing it is not exactly the best part of owning the truck.SPE’s 2017+ fuel filter system moves both filters underneath, uses the factory lower filter location, and keeps everything service-friendly. The water separator side uses a CAT 256-8753 filter, while the main fuel filter uses a CAT 1R0749 2-micron filter. Better access, better filtration, and a cleaner engine bay.