CHAMPION COPPER PLUS™ SPARK PLUGS CHAMPION PLUG RN12YC/24PK

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 U.S.A. COPPER PLUS™ SPARK PLUGS NOTE: Part numbers beginning with "R" are resistor type. Order by Champion numbers. CHAMPION PLUG RN12YC/24PK CHAMPION PLUG RN12YC/24PK