Seller notes

Aluminum Knucklehead bare head set is casted of heat treated aluminum for 74" Knuckle motors, and is the large port type. Cast aluminum heads includes steel valve seats and large port screw - in inserts for 74" intake manifold. *NOTE: Accepts original valve spring cups. Uses 1-3/8" large hex 18mm plugs. *NOTE: Accepts large 1-3/8" hex Doering #3 spark plug set. FITS EL 1936-1947 FL 1941-1947 Shipping is free in the Lower 48 US States via United States Postal Service. Hi/AK/PR/APO AP may be highe...

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