Namura OEM Style Piston Kit .50MM NA-40011-2 fits 2003-2006 Yamaha Kodiak 450 YFM450FA 4X4 / 2006-2009 RHINO 450 YXR450FA 4X4 / 2006-2010 Wolverine 450 YFM450FX 4X4 / 2007-2008 RHINO 450 YXR450FSE 4X4 Special Edition

MOS2 (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