Namura TOP END REPAIR KIT 84.5MM NA-50002-6K fits 1994-1999 Polaris SPORT 400l / 1998 Polaris Xplorer 400l / 2003 Polaris Trail Blazer 400 / 1994 Polaris 400l 4X4 / 1994-1995 Polaris 400l 2X4 / 1995-2001 Polaris Xplorer 400 4X4

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