Team Associated RC10B74.2 Factory Team Carbon Front Gullwing Suspension Arms. This is an optional part intended for the RC10B74.2 and B74.2D series of vehicles. These carbon gullwing arms are stiffer and offer more responsive handling ideal for high traction or smoother surfaces. Package includes one left front carbon gullwing suspension arm, one right front carbon gullwing suspension arm and two suspension arm spacers.