{"product_id":"mcs512522","title":"S\u0026S Superstock Evo Cyl. Head Kit. Natural – 1984–1999 Evo Big Twin","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp\u003eNatural finish. Bolt-on with stock style flat top pistons. 82cc low compression heads for approx. 8.4:1 (80\"); 8.9:1 (89\"); 9.5:1 (96\") compression ratios. The port design allows these heads to outflow stock heads by a wide margin. This set-up can be used with up to .585\" lift with TDC lifts of .252\" intake and .210\" exhaust. All heads can be decked .060\" to increase compression but extra care must be taken when assembling decked heads to assure sufficient valve lift clearance. Compatible with fuel injection models and will take stock head temperature sensor. Heads come complete with valves; guides and valve springs installed.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e84-99 Evo Big Twin (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 512522\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePart Numbers\u003c\/h2\u003e\u003cp\u003eMCS Part Number: 512522\u003cbr\u003eManufacturer Part Number: 106-3466\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":44341727363392,"sku":"MCS512522","price":1642.28,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/512522k.jpg?v=1776035726","url":"https:\/\/hogparts.co.uk\/products\/mcs512522","provider":"Hogparts UK Ltd","version":"1.0","type":"link"}