STANDARD AND RESISTOR TYPES Patented Ultraseal™-coated shell for rust prevention Copper Plus™ spark plug has a copper core center electrode that allows for accurate control of heat range, optimizing performance and increases longevity of the spark plug Patented SAC-9 semi-conductor resistor for maximum EMI and RFI suppression Made in the USA COPPER PLUS™ SPARK PLUGS NOTE: Part numbers beginning with “R” are resistor type. Order by Champion numbers. Copper Plus™ Spark Plug CHAMPION PLUG (J12Y)
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