Aluminum 2-speed owner bulkhead is split from rear bulkheads to supply appropriate flex and maximum traction. The bulkheads have another mounting place ââ¬â 3 screws rather than 2 ââ¬â also for greater reinforcement about the rear layshaft area and improved on-power safety. The ball-bearing is installed in a composite bushing to get rid of vibration from engine. The master is CNC-machined from premium Swiss 7075 T6 aluminum to ensure the lightest & strongest assistance framework the 2-speed. Ebony color.