Motorcraft FD4637 is a fuel filter element for 2017-up Ford F-650 and F-750 trucks equipped with the 6.7L Power Stroke V8 diesel. It helps protect the high-pressure fuel system by trapping water and fuel-borne contaminants before they reach the CP4 pump and injectors, making it a smart service replacement for work trucks that depend on clean, consistent fuel delivery.

Motorcraft FD4637 Fuel Filter Features:

• Designed to meet OEM requirements for heavy-duty Ford medium-duty truck fuel filtration service.
• Filters 99.9% of particles 20 microns or larger to help keep abrasive debris out of injectors and fuel-system components.
• 300-series stainless steel case resists corrosion in demanding diesel service environments.
• Brazed connector and support washers add strength at critical filter assembly points.
• Engineered to meet SAE specifications and tested for leak resistance, corrosion resistance, thermal cycling, and uniform fuel flow.
• Direct service replacement for the earlier FD-4626 kit and crosses to Ford OEM numbers HC4Z-9N184-B and HC4Z-9N184-A.