Champion Champion Spark Plugs; Fits: > 48-74 Bigtwin

Champion  Spark Plugs; Fits: > 48-74 Bigtwin

  H-D 3-4. 14mm threaded, 1/2" (12.7mm) short reach. Used with 21mm spark plug socket. Copper-core center electrode. Spark plug comes with the patented Ultraseal™ coated shell, to help keep the spark plug body corrosion free and better looking for a longer period of time.

Part Number:

• 749672: J12YC Fits 1948 - 1952 E and EL Panhead and 1948 thru 1974 Shovelhead