Namura TOP END REPAIR KIT STD NA-40011K fits 2003-2006 Yamaha Kodiak 450 YFM450FA 4X4 / 2006-2009 Yamaha RHINO 450 YXR450FA 4X4 / 2006-2010 Yamaha Wolverine 450 YFM450FX 4X4 / 2007-2008 Yamaha RHINO 450 YXR450FSE 4X4 Special Edition

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