FORD 2000 F-150 - Manual (Page 5)

CNG FUEL SYSTEM COMPONENT IDENTIFICATION
The following illustrations depict the major unique components of the
CNG fuel system. All of these unique components are constructed of
special materials that withstand the effects of CNG. NEVER replace a
unique CNG fuel system component with a standard gasoline fuel system
component or any aftermarket component.
Servicing your vehicle
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