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I have a 500hp r34 gtr and I guess its time to upgrade the oil pump gears to something stronger that can handle rev limiter and shock. I've been looking for billet gears and came over the plazmaman gears for about $380, but then I saw Reimax had some Chromoly steel gears for about $250 parts number: 15110-AAR11-81. How is the strenght on these? Anyone heard about these shattering? Is chromoly steel as strong as billet? I have the oem 05u oil pump so the 81mm should fit?

Since their answer regarding my issue has taken over a week, I feel that a heads up regarding reimax oil pump gear clearance is justified. Found some old threads with this issue, then some newer ones stating that it's fine, and went for the "cheap" solution. This is the fitment of the uprated oil pump (over 0.45mm, got a 0.05 feeler gauge blade stacked beneath) on a brand new crank. Let me know what your experience has been with Reimax or similar solutions! Now, I'm waiting for a spline drive kit.. Don't do the same mistake as I did, the expensive solution will just cost even more (I lost oil pressure which led to bearing failure, and the crank needed a lot of work to be ok again. Someone, at some time, fitted a narrow nose crank in my late -93 R32. The oil pump chewed some small pieces of the bearing so it too had to be replaced or repaired.)