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