Namura TOP END REPAIR KIT NA-50012-4K fits 2015-2017 Polaris Scrambler 850, Sportsman Sp 850, Sportsman Sp 850 Touring / 2013-2014 Polaris Scrambler XP 850 HO, Scrambler XP 850 LE HO EPS, Sportsman 850 LE Touring HO EPS / 2015 Polaris Sportsman 850

Top End kit includes: piston, rings, wrist pin, clips, top end bearing, and gasket kitMOS2 (Teflon/Molybdenum) Coated Skirts A rolled on application process provides a bond that is 10 times stronger than other spray on coatings. Benefits include increased heat transfer, reduced friction and helping to eliminate cold seizuresMachined Smooth Heads Reflects combustion heat and reduces carbon buildup, protecting the top of the piston. Some tests have shown this feature can increase horsepower and fuel economy by up to 6%Anodized Domes Increases heat resistance and durability; pistons with anodized domes are 75% stronger than non-anodized pistonsHypereutectic Casting Process Provides higher silicon content for reduced expansion rates and additional wear resistance; it also has an ability to withstand higher cylinder temperatures