{"product_id":"motorshop-raw-iron-cylinder-head-set-for-harley-davidson-ul-1937-1946","title":"Motorshop Raw Iron Cylinder Head Set For Harley UL 74 To 80 Inch 1937-1946","description":"\u003cdiv\u003e\n\u003ch1\u003eMotorshop Raw Iron Cylinder Head Set for Harley UL 74-80 Inch (1937–1948)\u003c\/h1\u003e\n\u003cp\u003eRaw iron front and rear cylinder heads for Harley UL 74-inch and 80-inch engines, cast after the OEM Cast Ironheads and featuring WR-shaped combustion chambers for efficient combustion and authentic vintage styling.\u003c\/p\u003e\n\u003cp\u003eThe head set accepts 18mm spark plugs and Ironhead-length head bolts, enabling versatile compatibility with classic Harley models from 1937 to 1948. It is machined for brass primer cups to ensure proper fitment and sealing.\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eWR-shaped combustion chambers for improved combustion efficiency\u003c\/li\u003e \u003cli\u003eAccepts 18mm spark plugs and Ironhead-length head bolts\u003c\/li\u003e \u003cli\u003eMachined for brass primer cups to ensure proper fitment and sealing\u003c\/li\u003e \u003cli\u003eUses 1-3\/8 inch large hex spark plugs for easier installation and maintenance\u003c\/li\u003e \u003cli\u003eConstructed in Taiwan\u003c\/li\u003e \u003cli\u003eRecommended pairing: V-Twin copper head gaskets for better sealing and heat transfer\u003c\/li\u003e \u003cli\u003eSuggested accessories: #49-0009 Brass Head Primer Cups and #49-0878 18mm Doering Spark Plug Set\u003c\/li\u003e \u003cli\u003eFitment: Harley Davidson UL models from 1937 through 1948\u003c\/li\u003e\n\u003c\/ul\u003eRaw iron front and rear head set is for 74 inch and 80 inch models. This set is casted after the OE Cast Ironheads which features the squish inchWR inch combustion chamber.\n\u003cp\u003eUpgrade your vintage Harley Davidson UL engine with the Motorshop Raw Iron Cylinder Head Set, designed to deliver reliable performance and authentic style. These heads accept 18mm spark plugs and Ironhead length head bolts, making them compatible with a range of classic Harley models from 1937 to 1946. Crafted with precision, the heads are machined for brass primer cups, ensuring proper fitment and sealing. For optimal performance, it is recommended to use V-Twin copper head gaskets with this set, enhancing gasket sealing and heat transfer efficiency. The heads feature WR shape combustion chambers, which promote efficient combustion and power output. The large 1-3\/8 inch hex allows for easy installation and maintenance of the spark plugs, simplifying your engine rebuild or upgrade process.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003eAccepts 18mm spark plugs and Ironhead length head bolts for versatile compatibility\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eMachined for brass primer cups to ensure proper fitment and sealing\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003es WR shape combustion chambers for improved combustion efficiency\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eUses 1-3\/8 inch large hex spark plugs for easier installation and maintenance\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eSuggested to use with #49-0009 Brass Head Primer Cups and #49-0878 18mm Doering Spark Plug Set for optimal performance\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eConstructed in Taiwan for quality manufacturing\u003c\/li\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003cli\u003eCompatible with Harley Davidson UL models from 1937 through 1946\u003c\/li\u003e\u003c\/ul\u003e\n\u003cbr\u003e\nFitment:\u003cbr\u003e\nHarley Davidson UL 1937\u003cbr\u003e\nHarley Davidson UL 1938\u003cbr\u003e\nHarley Davidson UL 1939\u003cbr\u003e\nHarley Davidson UL 1940\u003cbr\u003e\nHarley Davidson UL 1941\u003cbr\u003e\nHarley Davidson UL 1942\u003cbr\u003e\nHarley Davidson UL 1943\u003cbr\u003e\nHarley Davidson UL 1944\u003cbr\u003e\nHarley Davidson UL 1945\u003cbr\u003e\nHarley Davidson UL 1946\u003cbr\u003e\nHarley Davidson UL 1947\u003cbr\u003e\nHarley Davidson UL 1948\u003c\/div\u003e","brand":"Motorshop","offers":[{"title":"Default Title","offer_id":44653247725610,"sku":"11-1779","price":591.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/2285\/8794\/files\/11-1779a.jpg?v=1785892562","url":"https:\/\/atticusgoods.com\/products\/motorshop-raw-iron-cylinder-head-set-for-harley-davidson-ul-1937-1946","provider":"Atticus Goods","version":"1.0","type":"link"}