Originally Posted by QDRHRSE

My car dos great on low-med traction wet dirt. With the book set up and lighter diff and shock oils my car makes our wet dirt feel dry. I think I used 5 & 3 for the diffs and 30/25 for the shocks. Other than that the only other change from stock is the lack of the 3 mm up travel limiter on the shocks. There is not a faster car on our track and I only have a 13.5. My indoor/dry car uses the book set up and a center gear diff w/100k. Its perfect for med-high traction dirt/clay. I cannot say enough good things about the XB4 2016. Its a miracle car.