SnowDogg Part # 16152138 - Gen 2 HPU Plastic Cover Driver Side is only used on the SnowDogg Generation 2 snow plows such as the HDII, EXII and more. If you're looking at your plow while standing at the front of the blade, this is the driver's side HPU cover which protects your hydraulic unit. If you need the passenger's side front cover for your HPU, check out part # 16152140.