Xpress Execute XQ1 hard suspension arms
Coming from Xpress and made for the Execute XQ1 touring car are hard lower suspension arms. The wishbones are made from a harder compound material and offer less flex for improved suspension efficiency and a more controlled ride especially in medium to high-bite track conditions. In addition the harder arms are more durable than the original plastics and they improve car handling in high ambient temperatures.
Source: Xpress [rc-xpress.com]