New SFA Graphite Stiffeners for XB4


New SFA Graphite Stiffeners for XB4

XB4 owners now have the option to add Xray’s all-new innovative and unique SFA™ graphite stiffeners to their buggy which allows for a super-quick lower suspension arm flex adjustment to easily adjust the traction of the car under various track conditions. A short explanation made by Xray regarding their new SFA™ graphite stiffeners can be found below. 

Whether racing in low- or high-traction track conditions, you can easily adjust the flex of the lower arms by quickly and easily adding/removing optional graphite stiffeners to change the stiffness of the suspension. At the beginning of a race when traction is low, the arms may be used without SFA™ graphite stiffeners; as traction increases, the suspension can be easily stiffened by mounting the SFA™ 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.


  • SFA™ – Suspension Flex Adjustment
  • reinforces arms
  • changes suspension hardness
  • increases stability
  • easier to drive
  • for high-grip conditions
  • easy mount