Narrow Active Differential set for XB2. The first XRAY Active Differential is an extraordinary, adjustable front side side gear differential for XB2 . . . greatly boosting the buggy's cost and managing characteristics. The unique design of interior elements utilizing different angled portions allows the diff gears to connect on-power to enhance the forward traction, rendering it faster and easier to drive. Although the XRAY Active Differential is a performance option for serious racers who want to gain an advantage on superior rate and maneuvering, it is also of great advantage to motorists of all the amounts that are looking a far more predictable and easy-to-drive car for most battle conditions. Ball-bearings perhaps not included. Notice: whenever building the Active Diff always utilize all 4 inside satellite gears. Don't ever simply utilize 2 interior satellite gears.