Namura PISTON KIT NA-50026-2 fits 1995-1998 Polaris Magnum 425 2X4, Magnum 425 4X4 / 1996-1997 Polaris Magnum 425 6X6 / 2000-2002 Polaris Xpedition 425 4X4 / 2001-2005 Polaris Sportsman 400 4X4 / 2006-2007 Polaris Sportsman 450 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