{"product_id":"knucklehead-rocker-arm-set","title":"Knucklehead Rocker Arm Set","description":"\u003cp\u003eMachined Knucklehead rocker arm set.\n\u003cbr\u003eFor use on the 1936-1937 valve spring cup and cap style covers  where the rocker arms will be exposed. The outer diameter of the rocker arm is turned down to .80 inch on the center portion  excluding the seal surface area on the pushrod side. This is for added clearance on 1938-1947 model lower tin covers. Sold as a 4 piece set. *NOTE: Right side of arm seal surface with ground outer diameter for single point seal contact. *NOTE: Before installation  re-surface the head gasket by fly cutting or blanchard grinding. Re-check bore size  STD  .010 or .020 oversize. Rivet head that plugs holes from oil passages  must be removed. \n\u003cbr\u003e Instructions: http:\/\/www.vtwinmfg.com\/Instructions\/11\/11-1157.pdf\u003c\/p\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\n1938 Harley Davidson EL\u003cbr\u003e\n1939 Harley Davidson EL\u003cbr\u003e\n1940 Harley Davidson EL\u003cbr\u003e\n1940 Harley Davidson FL\u003cbr\u003e\n1941 Harley Davidson EL\u003cbr\u003e\n1941 Harley Davidson FL\u003cbr\u003e\n1942 Harley Davidson EL\u003cbr\u003e\n1942 Harley Davidson FL\u003cbr\u003e\n1943 Harley Davidson EL\u003cbr\u003e\n1943 Harley Davidson FL\u003cbr\u003e\n1944 Harley Davidson EL\u003cbr\u003e\n1944 Harley Davidson FL\u003cbr\u003e\n1945 Harley Davidson EL\u003cbr\u003e\n1945 Harley Davidson FL\u003cbr\u003e\n1946 Harley Davidson EL\u003cbr\u003e\n1946 Harley Davidson FL\u003cbr\u003e\n1947 Harley Davidson EL\u003cbr\u003e\n1947 Harley Davidson FL","brand":"V-Twin","offers":[{"title":"Default Title","offer_id":55921724752040,"sku":"11-1157","price":1075.95,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0747\/8273\/6552\/files\/11-1157a.jpg?v=1787861788","url":"https:\/\/speedguyscanada.com\/products\/knucklehead-rocker-arm-set","provider":"THE SPEED GUYS CANADA ","version":"1.0","type":"link"}