Aluminum lower front part LEFT bulkhead CNC-machined from premium lightweight Swiss 7075 T6 aluminum provides improved tightness and flex traits for better steering faculties, even with hard spec tires. Redesigned to match the updated composite anti roll club bearing bushings that eliminate the wear of the bulkhead. The super-lightweight Swiss 7075 T6 aluminum bulkheads have really a tremendously neat and lightweight design to provide the cheapest fat and CG.