Graphite Rear Lower Suspension Arm Left -1.0mm for BD-11 is a genuine Yokomo RC product. It is intended for BD-11 compatible Yokomo chassis. It is a Yokomo option or replacement part for maintenance, setup adjustment, and performance tuning. The design is based on a setup used by team drivers at the 2023 IFMAR World Championship. The shorter arm length helps chassis roll contribute to traction, especially on lower-grip outdoor asphalt surfaces.