The aluminum bulkheads are made to join the lower chassis plate and battery pack tray together in a durable, effective, and lightweight design. The bulkheads offer optimal stiffness, flex and managing characteristics, even if utilizing harder foam tires. The bulkheads are CNC-machined from premium Swiss 7075 T6 aluminum to give you the lightest & strongest framework for the automobile. The bulkheads feature a striking titanium color.