Originally Posted by BroncoHauler
All depends on the head/neck height of the riders in the seat. Headrests are intended to reduce the risk of whiplash.
Right, thanks! I just wondered if the 4-point belts themselves depended on the headrests in order to avoid ... er, choking? ;-) the beloved passengers or something. It sort of looked like the belt performance didn't require the headrests for structural separation or anything like that.