Manufactured by Namura Kit includes piston, rings, pin, clips 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 Kit is for .020 over bore size 85.00mm Piston is 84.95mm Made in Taiwan Fits 2003 Yamaha Kodiak 450 4x4 YFM450FA 2004 Yamaha Kodiak 450 4x4 YFM450FA 2005 Yamaha Kodiak 450 4x4 YFM450FA 2006 Yamaha Kodiak 450 4x4 YFM450FA 2006 Yamaha Rhino 450 YXR450F 2006 Yamaha Wolverine 450 4x4 Auto YFM450FX 2007 Yamaha Grizzly 450 4x4 Auto IRS YFM450FG 2007 Yamaha Rhino 450 YXR450F 2007 Yamaha Wolverine 450 4x4 Auto YFM450FX 2008 Yamaha Grizzly 450 4x4 Auto IRS YFM450FG 2008 Yamaha Rhino 450 YXR450F 2008 Yamaha Wolverine 450 4x4 Auto YFM450FX 2009 Yamaha Grizzly 450 4x4 Auto IRS YFM450FG 2009 Yamaha Rhino 450 YXR450F 2009 Yamaha Wolverine 450 4x4 Auto YFM450FX 2010 Yamaha Grizzly 450 4x4 Auto IRS YFM450FG 2010 Yamaha Wolverine 450 4x4 Auto YFM450FX 2011 Yamaha Grizzly 450 4x4 Auto IRS YFM450FG 2012 Yamaha Grizzly 450 4x4 Auto IRS YFM450FG 2013 Yamaha Grizzly 450 4x4 Auto IRS YFM450FG 2014 Yamaha Grizzly 450 4x4 YFM450D