Why does I/O Port require their brace to be bolted to the back of the seat?
The brace is designed to clamp to the shoulder harness bar of the roll cage. If the brace was not bolted to the back of the seat, in an accident, the rearward motion of the seat could force the brace to rotate on the shoulder harness bar rendering the brace useless. When the brace is bolted to the back of the seat, this makes a solid connection between the seat and the roll cage and the brace cannot rotate on the shoulder harness bar. This is in addition to helping prevent lateral movement.
