Here’s the rotors mounted. The stock pump is a true Gerotor, in which the HKS and many aftermarket pumps are more of the Duocentric rotor design and style.The RB25 crank collar difficulty is really quite common on quite a few RB motors, including the RB20DET and pre-1993 RB26DETT. The situation With all the crank collar is since the A part of the