• Complete X1 ball differential set • Direct replacement gear differential • Improves traction in low hold conditions • Enhances security • simpler to drive • Fits X1 Complete ball differential set the X1 is direct replacement this product differential without other extra elements required without extra improvements. Using the ball differential makes the automobile more stable and a lot more an easy task to push, especially in suprisingly low hold conditions like asphalt or low hold carpeting. The ball diff increases on-power steering which is required on a variety of tracks.