Manufactured by Namura Kit includes piston, rings, pin, clips, top end gasket kit you get exactly what is pictured Cast piston has super-high silicone content for additional strength Piston skirts are Molybdenium Teflon coated to minimize resistance/wear and provide extended life Piston dome is anodized for superior heat resistance and longer lifespan Namura gaskets use performance materials to increase durability and provide greater reliability Includes all gaskets pictured to rebuild top end Kit is for standard bore size 87.90mm Piston is 87.89mm Made in Taiwan Fits 1997 Polaris Magnum 425 2x4 1997 Polaris Magnum 425 4x4 1997 Polaris Magnum 425 6x6 1998 Polaris Magnum 425 2x4 1998 Polaris Magnum 425 4x4 2000 Polaris Xpedition 425 4x4 2001 Polaris Sportsman 400 4x4 2001 Polaris Xpedition 425 4x4 2002 Polaris Sportsman 400 4x4 2002 Polaris Xpedition 425 4x4 2003 Polaris Sportsman 400 4x4 2004 Polaris Sportsman 400 4x4 2004 Polaris Ranger 425 2x4 2005 Polaris Ranger 425 2x4 2005 Polaris Sportsman 400 4x4 2006 Polaris Sportsman 450 4x4 2007 Polaris Sportsman 450 4x4 2008 Polaris Sportsman 400 HO 4x4 2009 Polaris Sportsman 400 HO 4x4 2010 Polaris Ranger 400 4x4 HO 2010 Polaris Sportsman 400 HO 4X4 2011 Polaris Ranger 400 4x4 HO 2011 Polaris Sportsman 400 HO 4x4 2012 Polaris Ranger 400 4x4 2012 Polaris Sportsman 400 HO 4x4 2013 Polaris Ranger 400 Midsize 2013 Polaris Sportsman 400 HO 4x4 2014 Polaris Ranger 400 4x4 2014 Polaris Sportsman 400 HO 4x4