{"product_id":"mcs512371","title":"S\u0026S Shovel Cylinder Head Kit. Std Bore. Natural – 66-E78 Big Twin with O-Ring Style Heads","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp\u003eNatural aluminum finish. O-ring style. Stock style; bolt-on; replacement cylinder heads from S\u0026amp;S for 66-84 Shovelhead models. S\u0026amp;S heads are designed as stock replacement. Still; where stock heads flow about 124 cfm @ 10\"; S\u0026amp;S heads do improve these figures somewhat and typically flow around 135 cfm @ 10\". Heads come assembled with valves; springs; collars; valve guide seals; rocker cover and exhaust mount hardware etc. (excl. rocker arms and covers) and complete with cylinder head; rocker cover and exhaust gaskets. These heads are ready to run and will accept camshafts with a lift of up to .590\".\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e66-E78 Big Twin with O-ring style heads (NU)\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eProduct Details\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e S\u0026amp;S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Motor parts \u0026gt; Cylinder heads\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e PR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 512371\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePart Numbers\u003c\/h2\u003e\u003cp\u003eMCS Part Number: 512371\u003cbr\u003eManufacturer Part Number: 90-1496\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":44341767340352,"sku":"MCS512371","price":1519.91,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/512371k.jpg?v=1776035372","url":"https:\/\/hogparts.co.uk\/products\/mcs512371","provider":"Hogparts UK Ltd","version":"1.0","type":"link"}