{"product_id":"bikeman-performance-billet-head-kit-for-polaris-patriot-9r-850-and-boost","title":"Bikeman Performance Billet Head Kit for Polaris Patriot 9R, 850, and Boost","description":"\u003cp\u003e\u003cstrong\u003eBikeman Performance Billet Head Kit for Polaris Patriot 9R, 850, and Boost\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBikeman Performance Billet Head Kit for Polaris Patriot 850, 9R, and Patriot Boost engines (2019+). The CNC-machined billet head has expanded coolant passages and flow across the combustion chambers to lower operating temperatures. Contoured dome profiles and a wider squish band aim to eliminate detonation hot spots that trigger the DET sensor and limp mode. Claimed gains: 4-5 HP low altitude; up to 8+ HP overall; high altitude 7-8 HP mid-range and 5-6 HP peak. Domes are replaceable for elevation, compression, or boost changes. Domes: 850 NA low altitude, 40.5cc, 11.8:1 (0-6,000 ft, 04-318-L); 850 NA high altitude, 36.5cc, 12.8:1 (6,000-9,000+ ft, 04-318-H); 9R pump gas, 42cc (0-12,000 ft, 04-318-9R); 9R race, 37cc, requires 110 octane race fuel (100% below 6,500 ft, 30% blend above); Boost turbo, 43cc, lower compression for higher boost.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e Polaris: Patriot Boost Long Track, Patriot Boost Short Track, Patriot 9R, Patriot 850 NA Long Track, Patriot 850 NA Short Track, AXYS 850.\u003c\/p\u003e\u003cp\u003e\u003cem\u003ePart # 04-318, 04-318-H, 04-318-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":"Polaris 850 Low Altitude","offer_id":67779236790508,"sku":"04-318-L","price":599.95,"currency_code":"USD","in_stock":true},{"title":"Polaris 850 High Altitude","offer_id":67779236823276,"sku":"04-318-H","price":599.95,"currency_code":"USD","in_stock":true},{"title":"Polaris 850 Boost Turbo Dome","offer_id":67779236856044,"sku":"04-318","price":599.95,"currency_code":"USD","in_stock":true},{"title":"Polaris 900 Pump Gas","offer_id":67779236888812,"sku":"04-318","price":599.95,"currency_code":"USD","in_stock":true},{"title":"Polaris 900 Race Gas","offer_id":67779236921580,"sku":"04-318","price":599.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0570\/6357\/1611\/files\/04-318.webp?v=1792341091","url":"https:\/\/freshiesbuilt.com\/products\/bikeman-performance-billet-head-kit-for-polaris-patriot-9r-850-and-boost","provider":"Freshies Built, LLC","version":"1.0","type":"link"}