Back surprise tower features updated geometry with different shock mount and camber website link jobs on a tower that is lower overall in comparison to previous versions. The surprise mount locations were repositioned about the location of lower shock mount extensions on the suspension hands, resulting in improved part rate. Updated front roll center roles assist produce more steering and also the revised rear roll center positions free up the rear end of car helping with security on power. Machined from extra-thick 4.0mm premium-grade graphite for light weight and energy. Fits both GTX and GTXE.