{"product_id":"motortechnic-10-1640-1937-knucklehead-head-set","title":"Motortechnic 10-1640 1937 Knucklehead Head Set","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.\n\u003cp\u003eThe Motortechnic 10-1640 1937 Knucklehead Head Set is designed for Harley-Davidson EL applications from 1937 through 1939. This set uses 1-3\/8-inch large-hex, 18 mm spark plugs and includes installed valve seats.\u003c\/p\u003e\u003cp\u003eFitment includes 1937 Harley-Davidson EL, 1938 Harley-Davidson EL, and 1939 Harley-Davidson EL models. Motortechnic recommends using this set with the 49-0878 18 mm Doering Spark Plug Set. Refer to the manufacturer's instructions for installation details.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eApplication: 1937 Knucklehead head set\u003c\/li\u003e\n\u003cli\u003eSpark Plug Size: Uses 1-3\/8-inch large-hex, 18 mm plugs\u003c\/li\u003e\n\u003cli\u003eValve Seats: Valve seats are installed\u003c\/li\u003e\n\u003cli\u003eFitment: Fits 1937, 1938, and 1939 Harley-Davidson EL models\u003c\/li\u003e\n\u003cli\u003eRecommended Accessory: Suggested for use with the 49-0878 18 mm Doering Spark Plug Set\u003c\/li\u003e\n\u003cli\u003eAccessory Items: 49-1348 - 1936 EL Cylinder Head Set Bare, 49-1353 - 1936 EL Knucklehead Cylinder Head Set Black, 49-1349 - Bare 1938-1939 EL Knucklehead Cylinder Head Set, 49-1310 - 1937-1938 EL Knucklehead Bare Cylinder Head Set\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\nHarley Davidson EL 1937\u003cbr\u003e\nHarley Davidson EL 1938\u003cbr\u003e\nHarley Davidson EL 1939\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eUOM: SET\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eCountry Of Origin: GERMANY\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003e\nAccessory Items:\n49-1348 - 1936 EL Cylinder Head Set Bare\r\n49-1353 - 1936 EL Knucklehead Cylinder Head Set Black\r\n49-1349 - Bare 1938-1939 EL Knucklehead Cylinder Head Set\r\n49-1310 - 1937-1938 EL Knucklehead Bare Cylinder Head Set\n\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eTech Notes: Suggested to use with #49-0878 18mm Doering Spark Plug Set.\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Motortechnic","offers":[{"title":"Default Title","offer_id":68363804442809,"sku":"10-1640","price":6008.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/0179\/2441\/files\/10-1640a.jpg?v=1794572403","url":"https:\/\/www.thespeedshopusa.com\/fr\/products\/motortechnic-10-1640-1937-knucklehead-head-set","provider":"THE SPEED SHOP USA","version":"1.0","type":"link"}