{"product_id":"1937-knucklehead-head-set-v-twin-10-1640","title":"1937 Knucklehead Head Set - V-Twin 10-1640","description":"\u003cp\u003e1937 Knucklehead head set is accurately cast with the original factory markings for the 61 inch models and features a black finish. The heads include 61 inch intake nipples that are installed.\u003c\/p\u003e\n\u003cp\u003eUses 1-3\/8 inch large hex 18mm plugs. *NOTE: Valve seats are installed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eSuggested to use with 18mm Doering Spark Plug Set.\u003c\/li\u003e\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e1937-1939\u003c\/td\u003e\n\u003ctd\u003eEL\u003c\/td\u003e\n\u003c\/tr\u003e\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003e\u003ca href=\"http:\/\/www.vtwinmfg.com\/Instructions\/10\/10-1640.pdf\" target=\"_blank\" rel=\"noopener\"\u003eInstallation instructions (PDF)\u003c\/a\u003e\u003c\/p\u003e","brand":"Motortechnic","offers":[{"title":"Default Title","offer_id":67549243146398,"sku":"10-1640","price":4789.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1692\/2127\/files\/10-1640a.jpg?v=1791646639","url":"https:\/\/chopcult.com\/products\/1937-knucklehead-head-set-v-twin-10-1640","provider":"ChopCult","version":"1.0","type":"link"}