This kit allows you to flatten the RTB steering links, generating less active toe. The result is as follows:
 
+ stability
+ freewheeling in corners
+ front grip without generating traction roll.
+ consistency
 
The 2.5mm balls have been redesigned to eliminate steering play. They are now made of treated steel to prevent deformation.
 
The differential bearings are now held in place by a small piece of elastic steel sheet, which prevents play or excessive tightening of the differential bearings.
With this kit, you will need to adjust the length of the steering links to 25.5mm to get the original toe out of the RTB.