The Champion W-10 spark plug is a new old stock (NOS) product designed for use in Ford Fairbank hit miss gas engines. This spark plug, with the OE/OEM part numbers W10 and W-10, plays a critical role in the ignition system of the engine, ensuring proper combustion for optimal performance. Made by Champion, a trusted brand in ignition systems, this spark plug is a reliable component for maintaining or restoring vintage Ford engines.