Narrow Active Differential set for XB2. Initial XRAY Active Differential is an extraordinary, adjustable front side side part gear differential for XB2 . . . greatly boosting the buggy's price and handling traits. The initial design of interior elements using different angled portions allows the diff gears for connecting on-power to enhance the forward traction, making it faster and better to drive. Even though XRAY Active Differential is a performance selection for serious racers who wish to gain an edge on superior rate and maneuvering, it's also of good benefit to motorists of the many quantities trying a predictable and easy-to-drive car for some battle conditions. Ball-bearings perhaps not included. Notice: whenever building the Active Diff always utilize all 4 inside satellite gears. Don't ever just use 2 interior satellite gears.