2 Pack - 12mm Long Reach Champion® Spark Plugs for Twin Cam 88®, 96™, 103™, Sportster®, X-Wedge and S&S 4 1/8" Bore Engines | S&S Cycle
Champion Copper Plus Spark Plug - J12YC Harley-Davidson Motorcycle - Dennis Kirk
E3.34 Spark Plug | E3Spark Plugs
Champion Copper Plus Spark Plug - RN12YC Harley Motorcycle - Dennis Kirk
Champion Copper Plus Spark Plug - RN12YC Harley Motorcycle - Dennis Kirk
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SparkPlugs.com: RN12YC $3.16 Champion 404 Spark Plug - Best Car SparkPlug Replacement
Champion® 404 RN12YC Copper Spark Plug for V-Twins - Replacement for OEM# 5R6A on 1984-2000 Evolution and 1975-1980 Shovelhead (1200cc) Harley Motors - MADE IN USA - Billet Proof Designs