I have an original 165k motor in my 89 240sx. Since I have heard more than once that the oil pump should be replaced on such a high mileage motor and I have to pull the oil pump anyway to replace the timing chain and the tensioners I thought I would upgrade.

I have seen reference to a NISMO oil pump for these care. They come with a metal (brass) gear. I cannot seem to find a place that sells these things.

I also found a place online that I have never dealt with that claims to sell a high flow oil pump, but I don't know anything about them.

What are you guys running, stock new, Nismo, or high flow? Where are you guys picking these up?

Thanks,
Dan