Manufactured by NamuraKit includes piston, rings, pin, clips (you get exactly what is pictured)Cast piston has super-high silicone content for additional strengthPiston skirts are Molybdenium Teflon coated to minimize resistance/wear and provide extended lifePiston dome is anodized for superior heat resistance and longer lifespanKit is for .040 over bore size - 40.00mmPiston is 39.98mmMade in TaiwanFits:2007 Polaris Predator 502008 Polaris Outlaw 502009 Polaris Outlaw 502010 Polaris Outlaw 502011 Polaris Outlaw 502012 Polaris Outlaw 502013 Polaris Outlaw 502014 Polaris Outlaw 502015 Polaris Outlaw 502016 Polaris Outlaw 50