This Heavy Duty Rear Upper Plate is a machined alloy option part for HPI Baja 1/5th scale vehicles. This is an authentic HPI bolt-in upgrade part that is precision built to the exact factory specifications for a perfect fit. Heavy duty aluminum construction adds strength for resistance to crash damage and holds the rear of the chassis firmly in place. Machined from billet aluminum and gunmetal anodized for a custom look. This upgrade part replaces the stock rear upper plate (#87483).