{"product_id":"bikeman-performance-billet-head-kit-axys-800-18","title":"Bikeman Performance Billet Head Kit \/ AXYS 800 (18+)","description":"\u003cp\u003e\u003cstrong\u003eBikeman Performance Billet Head Kit \/ AXYS 800 (18+)\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBolt-on power upgrade for the 2018 AXYS 800. The head has twice the cooling capacity, keeping the motor cooler so it holds horsepower by staying below the 120-degree timing curve. Two dome configurations are offered. The 800-37.5 has a 12.5:1 compression ratio, suited to 6000-9000 ft, and gains 7-8 HP in the mid-range and 5-6 HP at peak. The 800-41 is the lower 11.8:1 compression version for sea level to 6000 ft and gains 4-5 HP. The stock 12.1-12.2:1 compression makes the detonation sensor trip easily and prevents leaning out the motor. With the 800-41, a fuel controller can be used to lean the machine and gain 5-6 safe HP. Some buyers choose it simply to run cooler and avoid detonation sensor limp mode. Its dome design has a wider squish band and radius for power and reliability.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e Polaris: AXYS 800 H.O..\u003c\/p\u003e\u003cp\u003e\u003cem\u003ePart # 04-315-H, 04-315-L.\u003c\/em\u003e\u003c\/p\u003e\u003cp\u003eNot sure what fits your sled? Email kyle@freshiesbuilt.com with your year, make, model and track length.\u003c\/p\u003e","brand":"Bikeman Performance","offers":[{"title":"Low Altitude (0-6000 ft)","offer_id":67779332669676,"sku":"04-315-L","price":599.95,"currency_code":"USD","in_stock":true},{"title":"High Altitude (6,000+ft)","offer_id":67779332702444,"sku":"04-315-H","price":599.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0570\/6357\/1611\/files\/polaris-800-billet-head.jpg?v=1792341258","url":"https:\/\/freshiesbuilt.com\/products\/bikeman-performance-billet-head-kit-axys-800-18","provider":"Freshies Built, LLC","version":"1.0","type":"link"}