Champion Spark Plug- RN9YC & RN11YC4-322

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Champion Copper Plus Automotive Spark Plug, For Use With Small Engines, 14 mm Thread, 3/4 in 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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