This is an optional Hot Bodies V2 Standard Height Wing Mount, intended for use with the D8 family of buggies. This mount replaces the older mount and provides a one-piece, lightweight mount that is approximately half the weight of the original.
As used by Ty Tessmann to win the IFMAR 1/8th Off-Road World Championship 2014.
Note: Hot Bodiesa also offers this V2 wing mount with a 10mm height increase (HBS114415).