Vehicular Components Filler Neck

A metallic tubular item specificlly designed for directing the flow of a fluid, and must accommodate a cap (as modified) or breather on one end. the opposite end has provisions for mounting directly on, or indirectly through a pipe, tube, or hose to an engine crankcase, radiator, fuel tank, transmission housing, and the like. it may have means for overflow. for items which do not accommodate a breather or cap, see tube, pipe or hose (as modified).