49-0878 - 18mm Doering Spark Plug Set

Large hex original design for air cooled engines #3 heat range terminal nuts and seal washers included.
Includes top ventilated brass collars for cooling as original Doering design! Terminal nut is removable. Plug set has a round feeler gauge. Spark plugs have a 18mm thread and the large hex measures 1-3/8 which is perfect for early restoration and riding. Set is for use with 1924 Harley models that require 7/8 thread spark plug. *NOTE: Sold as a pair. *NOTE: Fits early Knuckleheads that can accept the 1-3/8 large hex. *NOTE: Air cooled spark plug set features a nickel plated full size hex. Full size hex is for single and twin flat heads For IOE types with space for the large hex. Doering Spark Plug Company was founded in Brooklyn NY in 1918 making plugs for tractors. In the later years they made plugs for automotive applications for motors that burned an excessive amount of oil. They are manufactured to the original standards of that era but not in Brooklyn any longer.

Fits:
G 1936-1947
J 1926-1929
JD 1924-1930
RL 1930-1936
U 1937-1948
VL 1930-1936
W 1937-1947

UOM: SET
Country Of Origin: TAIWAN
OEM Cross Reference: 36-11

Accessory Items:
49-0880 - 7/8 Doering Spark Plug Set
16-1387 - 18mm x 1-3/8 Hex Spark Plug Socket Parkerized
49-0980 - Replica 18mm Spark Plug Set
32-1231 - Brass Spark Plug Cool Fin Set

Tech Notes: Set gap at .025inch.