ProX Racing Parts linkage rebuild kits are available for Off Road applications. The complete rebuild kits come with all necessary parts you need to completely rebuild your linkage arms. The shafts supplied are made from 52100 bearing steel and precision ground. Needle bearings are made from 52100 bearing steel, ARC61-65 heat treated and have a ST13 steel shell. Bushings are case hardened and plated to prevent wear and corrosion. All linkage kits include the lower shock bearing kits.