The original XRAY Center Active Differential is a superior, adjustable gear differential that vastly improves the buggy's speed and managing faculties. The unique design of the interior components, using different angled parts, permits the diff gears to trigger on-power to enhance ahead traction and security to help make the buggy faster and more simple to drive. As the XRAY Active Center Differential is a performance selection for serious racers who wants to gain a plus on superior speed and maneuvering, it will likewise gain any degree of motorist that wishes a much more predictable and easy-to-drive vehicle in nearly every racing conditions. Ball-bearings maybe not included