Here’s the rotors installed. The stock pump is a real Gerotor, where the HKS and most aftermarket pumps tend to be more of the Duocentric rotor structure. Wonderful folks over at jjsmotorsport. These fellas went previously mentioned and past to make sure get the perfect substitution engine for my Skyline. https://daltonrsbwa.dailyhitblog.com/33655758/the-5-second-trick-for-nissan-skyline-rb26