Aluminum Knucklehead Bare Head Set
Cast aluminum heads includes steel valve seats and large port screw - in inserts for 74 inch intake manifold. *NOTE: Accepts original valve spring cups. Uses 1-3/8 inch large hex 18mm plugs. *NOTE: Accepts large 1-3/8 inch hex Doering #3 spark plug set.
Tech Notes: Suggested to use with #49-0878 18mm Doering Spark Plug Set. Suggested to use with #49-0878 18mm Doering Spark Plug Set.
FITS
Harley Davidson EL 1936
Harley Davidson EL 1937
Harley Davidson EL 1938
Harley Davidson EL 1939
Harley Davidson EL 1940
Harley Davidson EL 1941
Harley Davidson EL 1942
Harley Davidson EL 1943
Harley Davidson EL 1944
Harley Davidson EL 1945
Harley Davidson EL 1946
Harley Davidson EL 1947
Harley Davidson FL 1941
Harley Davidson FL 1942
Harley Davidson FL 1943
Harley Davidson FL 1944
Harley Davidson FL 1945
Harley Davidson FL 1946
Harley Davidson FL 1947
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