Mosfet Voltage Regulator Rectifier For Polaris RZR 800 Sportsman 800/500 Ranger 500/800 2010 2011 2012 2013 2014 OEM Repl.# 4012748 Brand new mosfet voltage regulator rectifier direct replacement Improved heat sink and charging capabilites Higher grade of electric components All shipped products are tested One year limited warranty