1、Fitment: Voltage regulator rectifier is replacement for Foreman ES TRX450FE 2002‑2004, replacement for Foreman TRX450FM 2002‑2004, replacement for Ski‑doo Expedition 550 Sport Carb F/C 2011‑2019. 2、OE Number: Regulator rectifier replace part number is 31600 HN0 671. Please double check the OE part number of your item before ordering. 3、Function: Improve engine power and provide stable voltage, directly improve the performance of low speed torsion of vehicles, enhance engine power, increase speed. 4、Waterproof Feature: Precise aluminium alloy material and waterproof performance, which can adapt to various environments. 5、Excellent Performance: Strong anti vibration and anti interference ability, high working efficiency and low vehicle fuel consumption.