It is about 5200. But back to the question. H22 and H23 gears are pretty much the same except the H23 has a longer 5th gear, which I doubt you'll ever get to in the 1/4. So, in turn, either one is good, H23 will save you a little gas on the highway, but nothing major. If you want good 1/4 times, make sure to get some sort of LSD, it's cheaper to buy it with the tranny.