1. The upgrade parts are made of 7075 aluminum, by adopting whole shaped technology, the product has the characteristic of high intensity and durability. 

2. We have redesigned & made the bearings bigger for AR 90 ring & pin gear set:
   
19mm x 8mm x 6mm instead of 16mm x 8mm x 5mm

3. In order to withstand more impact, we have improved the fixing screws.

4. The item fits Losi Super Baja Rey 1/6&Losi Super Rock Rey 1/6.