Champion Spark Plug- RJ12YC

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Champion Copper Plus RJ12YC J-Gap Standard Spark Plug, For Use With 4-Cycle Engines, 14 mm Thread PRODUCT OVERVIEW: RN9YC & RN11YC4-32: Resistor plug, 14mm, 3/4" reach, 13/16" hex head, projected tip, copper core. RJ12YC: Resistor plug, 14mm, 3/8" reach, 13/16" hex head, standard projected core nose, copper core design.

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