29-47 Flathead Knucklehead

18mm Spark Plugs

 Champion D16 sold as Pair

UL 1937-1947

EL 1936-1940

WL 1929-1952

FL 1941-1947

Chrome spark plug holder clamps to the rear frame tube behind the oil tank on rigid Big Twins. Fits two 14mm spark plu

Spark plug holder holds two sp

WL 1929-1952
EL 1936-1940
UL 1937-1947
FL 1941-1947