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 .040 over bore size 86.00mm Piston is 85.97mm 11 1 Compression ratio Made in Taiwan Fits 1999 Honda TRX400EX Sportrax 2000 Honda TRX400EX Sportrax 2001 Honda TRX400EX Sportrax 2002 Honda TRX400EX Sportrax 2003 Honda TRX400EX Sportrax 2004 Honda TRX400EX Sportrax 2005 Honda TRX400EX Sportrax 2006 Honda TRX400EX Sportrax 2007 Honda TRX400EX Sportrax 2008 Honda TRX400EX Sportrax 2009 Honda TRX400X Sportrax 2012 Honda TRX400X Sportrax 2013 Honda TRX400X Sportrax 2014 Honda TRX400X Sportrax