• Complete X1 ball differential set • Direct replacement gear differential • Improves traction in low hold conditions • Enhances security • easier to drive • Fits X1 Complete ball differential set the X1 is direct replacement the product differential without the other additional elements needed without additional improvements. Using the ball differential makes the vehicle more stable and much more a simple task to push, especially in suprisingly low hold conditions like asphalt or low hold carpeting. The ball diff increases on-power steering which will be required on all sorts of tracks.