1937-1938 EL Knucklehead Bare Cylinder Head Set
Exact for 1937 only but can be used on 1937-1939 61 inch EL models. Either type of valve spring cover can be installed either cup type of full cover and top set. Accepts inchBaby Butt inch intake manifold springs valves collars spring cups and top tins included and assembled. *NOTE: Valve seats are installed but not cut. Uses 1-3/8 inch large hex 18mm plugs. *NOTE: Heads include feature detailed casting hallmarks as original black painted. *NOTE: Accepts large 1-3/8 inch hex Doering #3 spark plug set. Material of valve seats features a better hardenability and heat resistance than 1.2713. Material is tough with high compressive strength and high tempering resistance. Hardness equals 370-415 HB. Tensile strength equals 1250-1400 N/mn2. Condition is tempered.
Tech Notes: Suggested to use with #49-0878 18mm Doering Spark Plug Set. Suggested to use with #49-0878 18mm Doering Spark Plug Set.
Instructions: http://www.vtwinmfg.com/Instructions/49/49-1310.pdf
FITS
Harley Davidson EL 1937
Harley Davidson EL 1938
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