See: Pro Star R/C

ProStar have introduced front suspension upper pillow ball “WING ARMS” for Team Associated RC8B3, Mugen Seiki MBX7 & MBX7R and SWORKz 350. These “Wing Arms” are designed to put more downforce on large high speed tracks. The arms are made from a super tough, strong and durable carbon nylon which do not change the geometry. The wings are made  from a super durable nylon, available in many colors. Comes with 4 titanium screws and 4 blue aluminum countersink washers.