Aluminum back engine Bulkhead - Appropriate has a 1-piece tweak-free design which more rigid and robust. Bulkhead feature centering pins on the top surface that align the top of pod dish during construction and prevent motion between the components during a crash. To further boost the construction's strength and opposition to tweak, the top of pod plate now makes use of 4 mounting screws to secure it toward bulkheads. The 1-piece bulkheads use eccentric bushing inserts for the rear axle height modification. CNC-machined from premium extra-hard Swiss 7075 T6 black-coated aluminum for longer life and a fashionable look.