Im 5'11'' and am pretty close to the ceiling if Im sitting up streight. You gotta remember one thing, since we're not standing in the seat, its really how far from the booty to the top of our head that makes the difference in the headroom. Some people are longer legged and some with a longer body. 6'4'' is pretty tall, I guess you could always ride in his 350Z when together, but compared to the Crossfire, the Z will be invisible :wink: