These are quite possibly the best set up for your Traxxas family of cars.
What you will need: Arms that have an upgraded out arm pin. All Fast Lane Arms feature this upgrade. If you have plastic arms, you can use a common 1/8" drill bit to modify the existing hole. And purchase FLM27610 front outer arm pin.
All Fast Lane Machine parts are CNC-machined from 6061 T-6 aluminum — see how aluminum compares to stock plastic.