Namura PISTON KIT +.5MM BORE NA-50025-2 fits 2003-2013 Polaris Trail Boss 330 / 2008-2013 Polaris Trail Blazer 330 / 2003-2005 Polaris Magnum 330 2X4 / 2003-2006 Polaris Magnum 330 4X4 / 2004-2005 Polaris ATP 330 4X4

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