Manufactured by Namura HyperDryve Series piston Kit Includes piston, rings, pin, clips you get exactly what is pictured The HyperDryve line of pistons is composed of a space-age hypereutectic aluminum alloy developed by NASA. Engineered to maintain its high tensile strength up to 700 F 370 C , 50% higher than a conventional cast piston, this gives HyperDryve pistons the strength to perform under operating conditions normally reserved for forged pistons. Piston skirts are Molybdenium Teflon coated to minimize resistance/wear and provide extended life. Also allows for smoother start-ups break-ins. Piston dome is anodized for superior heat resistance and longer lifespan Kit is for standard bore size 96.00mm Size A piston is 95.97mm Compression ratio of 12.0 1 Made in Taiwan Fits 2002 Honda CRF450R 2003 Honda CRF450R 2004 Honda CRF450R 2005 Honda CRF450R 2005 Honda CRF450X 2006 Honda CRF450R 2006 Honda CRF450X 2007 Honda CRF450R 2007 Honda CRF450X 2008 Honda CRF450R 2008 Honda CRF450X 2009 Honda CRF450X 2012 Honda CRF450X 2013 Honda CRF450X 2014 Honda CRF450X 2015 Honda CRF450X 2016 Honda CRF450X