{"product_id":"1937-knucklehead-head-set","title":"HARLEY 1937 Knucklehead Head Set Fits 1937-1939 EL,","description":"1937 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.  Uses 1-3\/8 inch large hex 18mm plugs. *NOTE: Valve seats are installed.   FITS HARLEY: 1937-1939 EL,   ","brand":"Motortechnic","offers":[{"title":"Default Title","offer_id":46838255288508,"sku":"10-1640","price":4597.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0655\/4366\/7900\/files\/10-1640a.jpg?v=1779174839","url":"https:\/\/paniccycles.com\/products\/1937-knucklehead-head-set","provider":"Paniccycles","version":"1.0","type":"link"}