{"product_id":"s-s-evolution-big-twin-performance-cylinder-heads-engine","title":"S\u0026S Evolution Big Twin Performance Cylinder Heads – Engine","description":"\u003cp\u003eExactly the same cylinder heads as S\u0026amp;S uses in their complete 1,340cc\/80CI V-Series engines. Feature 1.9\" diameter intake valves and 1.605\" diameter exhaust valves and give increased flow compared to stock Harley heads. These cylinder heads can be used with stock 3 1\/2\" bore, as well as 3 5\/8\" Big Bore with stock style flat topped pistons. The version with 82cc chamber give a 8.4:1 compression where stock heads give 8.5:1 compression. Heads with 76cc chambers give a 8.8:1 compression. Valve springs are compatible with up to .585\" lift cams. Heads come with valves and valve springs installed and are sold in sets for front and rear.\u003c\/p\u003e\n\u003cp\u003eNatural aluminum, 82cc chamber\u003c\/p\u003e\n\u003cp\u003eHead,Kit,Stock \u0026amp; 3-5\/8\" Bore,Performance\u003c\/p\u003e\n\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Cylinder Heads\u003c\/li\u003e\u003c\/ul\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":62566311985482,"sku":"233761","price":1829.95,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0971\/0016\/9546\/files\/standard-rgba_c99ed2c0-f30e-44ae-a34c-2e2b224a0699.png?v=1782766904","url":"https:\/\/partsdenmark.com\/products\/s-s-evolution-big-twin-performance-cylinder-heads-engine","provider":"Parts Denmark","version":"1.0","type":"link"}