{"product_id":"mcs531868","title":"S\u0026S Sidewinder Valve Spring Kit. .650\" Lift – 1984–1999 Evo Big Twin; 1999–2004 Twin…","description":"\u003ch2\u003eDescription\u003c\/h2\u003e\n\u003cp\u003eKit includes beehive springs; chromoly forged top collars; steel bottom collars; valve keepers and shims. Works with both 7mm and 5\/16\" valve stems and all S\u0026amp;S SuperStock® heads (5\/16\") valve stems. Springs are single wire conical (beehive) style springs; manufactured from clean high silicon Kobe alloy wire then micro shot peened and nitrided. 650\" valve lift. 1.860\" installed height; 178lbs valve seat spring pressure and 376lbs@.650\" lift. Maximum 6500 RPM.\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e84-99 Evo Big Twin\u003c\/li\u003e\n\u003cli\u003e99-04 Twin Cam\u003c\/li\u003e\n\u003cli\u003e86-03 XL Sportster (NU)\u003c\/li\u003e\n\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; Valve springs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e KIT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 531868\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePart Numbers\u003c\/h2\u003e\u003cp\u003eMCS Part Number: 531868\u003cbr\u003eManufacturer Part Number: 900-0050\u003c\/p\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":44341760295232,"sku":"MCS531868","price":267.51,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/531868k.jpg?v=1776035464","url":"https:\/\/hogparts.co.uk\/products\/mcs531868","provider":"Hogparts UK Ltd","version":"1.0","type":"link"}