Long ratio 05 DCCD USDM 2.5 6MT - ~2550 @ 100kmph (gps tested)

Short ratio 05 DCCD JDM 2.0 6MT - ~2800 @ 100Kmph, 3000rpm @ 110Kmph(gps tested)

Yours sounds like the really short spec c box possibly, or it could just be the short with a speedo error/wrong tire size on the car.