The cabin of the 718 GT4 and Spyder is focused on driver ergonomics, but standard seating options may lack sufficient lateral restraint for severe track use. Installing fixed-back Interior Parts (Racing Seats) decreases overall vehicle mass while holding the driver firmly in place under intense cornering forces. Proper lateral support improves steering accuracy and pedal modulation by eliminating the need for the driver to brace against the steering wheel or door cards.