Aluminum straight back Bulkhead - kept has a 1-piece tweak-free design that is more rigid and robust. Bulkhead feature centering pins at the top surface that align top of the pod meal during set up preventing movement between the components during a collision. To greatly help enhance the construction's energy and opposition to tweak, the top of pod dish now makes use of 4 mounting screws to secure it on bulkheads. The 1-piece bulkheads utilize eccentric bushing inserts the trunk axle height modification. CNC-machined from premium extra-hard Swiss 7075 T6 black-coated aluminum for longer life and a fashionable appearance.