Western Plow Part # 42902 - Motor Relay Kit Power Solenoid Fleet Flex is for the newer MultiPlex UltraMount2 plows. This is used on a variety of Western plows including, but not limited to, the MVP Plus V Plow, HTS Plow, and more. The best way to tell if this is the correct motor relay solenoid for your plow is to check how many pins your controller has. If you have a 4-pin plug controller, this is the solenoid you need. If your controller has 10-pins or 6-pins, you'd need Western part # 56131K .