Here’s the rotors installed. The inventory pump is a true Gerotor, wherever the HKS and many aftermarket pumps are more of the Duocentric rotor design.Nonetheless, The 2 are really similar, as well as RB25 is absolutely no slouch. You are able to think about the RB25 vs the RB26 as much like the 1JZ vs 2JZ debate. The RB25/1JZ are a little smalle