HARLEY Replica 18mm Spark Plug Set Fits 1936-1947 EL, 1941-1947 FL, 1937-1947 UL,

These spark plugs are for the antique motorcycle enthusiast who enjoy riding. Spark plugs are air cooled with a heat range #3. Includes the brass top nuts which are used with earlier style terminals or hood style and sealing gaskets. Set of two. Terminal nut is removable. Plug set has a round electode profile. Replica spark plugs have a 1-1/8 inch hex shape and 18mm thread. FITS HARLEY: 1936-1947 EL, 1941-1947 FL, 1937-1947 UL,