2007-2009 Yamaha YFM450 Grizzly 450 4WD/4x4/ Hunter/Spec. Ed. ATV Plug-In Electric Regulator / Rectifier Upgraded Rectifier Bridge Components Extra Heavy-Duty Regulator Circuit 1-Year Manufacturers Warranty Advanced Design Improves Voltage Output and Reliability - Exceeds O.E.M. Quality Compatibility: 2007-2009 Yamaha YFM450 Grizzly 450 4WD/4x4/ Hunter/Spec. Ed.