Aluminum 2-speed holder bulkhead is separate from the rear bulkheads to give appropriate flex and optimum traction. The bulkheads have an additional mounting position ââ¬â 3 screws rather than 2 ââ¬â for even greater reinforcement regarding the rear layshaft area and improved on-power stability. The ball-bearing is installed in a composite bushing to eliminate vibration from engine. The owner is CNC-machined from premium Swiss 7075 T6 aluminum to guarantee the lightest & strongest help framework the 2-speed. Ebony color.