2007-2009 Polaris Sportsman 500 EFI/HO EFI 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 Polaris Sportsman 500 EFI/HO EFI