New from Xray are these optional graphite lower arm plates which can easily change the hardness of the whole suspension. With the plates mounted, the arms are stiffer to make the car more stable and easier to drive under high-grip conditions. The plates can be easily mounted/dismounted using only 4 screws. Whether you drive in low or high-traction conditions, with the smart graphite stiffeners you can very quickly adjust your car to suit different conditions. At the beginning of a race event when traction is low, the arms are used without the SFATM graphite stiffeners. When traction increases, the suspension can easily be made stiffer by mounting the SFATM graphite stiffeners for more stability and easier driving characteristics. The graphite stiffeners give the car maximum stability in chicanes and allow for easier and smoother steering.