RDRP0205 - RB6 Rear Bulkhead MM Aluminium. The RDRP RB6 Rear Bulkhead MM Aluminium is designed to replace the kit's plastic bulkhead with a more durable and more precise part. Machined from high quality 7075-T6 and coming laser-etched for easy identification the part not only makes for a solid base for the upper camber link mounts and the wing mounts. Never ever score a DNF because the ballstud got ripped out in a crash.