The aluminum bulkheads are made to join the low framework dish and battery pack tray together in a durable, efficient, and lightweight design. The bulkheads offer optimal tightness, flex and handling characteristics, even when utilizing 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 function a striking titanium color.