This pump was very easy to install and fit to our current 3100 PSI, 2.5 GPM North Star pressure washer sold by Northern Tools. There were absolutely no leaks and it compared well with the pressure of the previous pump.
An OEM pump from Northern Tools for this pressure washer was ~$200 vs. the ~$60 at Walmart. The only downside is that the OEM pump has a longer life in terms of hours of usage. Even so, I believe that this pump will last ~10 years. I will consider buying a second pump from Walmart just to have on hand in the future, since the price is so reasonable!