The aluminum bulkheads are created to join the reduced framework dish and battery pack tray together in a durable, effective, and lightweight design. The bulkheads provide optimal tightness, flex and handling characteristics, although using harder foam tires. The bulkheads are CNC-machined from premium Swiss 7075 T6 aluminum to provide you with the lightest & strongest framework for the car. The bulkheads feature a striking titanium color.