Manufactured by Factory Spec Includes (1) rotor Made of premium tempered stainless steel Provides strong, reliable braking power Durable - works with all types of brake pads Replaces the REAR rotor on the Yamaha ATVs listed below: 2002 Yamaha Grizzly 660 4x4 (YFM660F) 2003 Yamaha Grizzly 660 4x4 (YFM660F) 2004 Yamaha Grizzly 660 4x4 (YFM660F) 2005 Yamaha Grizzly 660 4x4 (YFM660F) 2006 Yamaha Grizzly 660 4x4 (YFM660F) 2007 Yamaha Grizzly 660 4x4 (YFM660F) 2008 Yamaha Grizzly 660 4x4 (YFM660F)