{"product_id":"233761","title":"S\u0026S EVOLUTION BIG TWIN PERFORMANCE CYLINDER HEADS","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","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":56169305047415,"sku":"233761","price":34.65,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/3244\/1207\/files\/standard-rgba_db2d86e5-f19f-4c85-9339-564ee7c3beb3.png?v=1762985709","url":"https:\/\/shop.franklinmotors.ie\/products\/233761","provider":"Franklin Motors","version":"1.0","type":"link"}