This is an optional XRAY Composite Suspension Front Lower Arm (Hard).
HARD front lower suspension arm made from super-tough, high-tech composite material. The exclusive composite mixture used for suspension arms gives a perfect balance between reliability and performance; the suspension arm is rigid enough for a responsive feel and extreme durability.
This HARD arm is suitable for most track conditions, especially for medium- and high-traction tracks.
Universal design allows this front arm to be used on either left or right sides.