Samix TRX-4 brass diff cover
Coming from Samix and made for the Traxxas TRX-4 trail truck is a brass differential cover. The part adds 60g of weight to the lowest part of the chassis for improved climb performance. It also increases axle stiffness for optimised transmission efficiency while the overall design improves visual impact. The cover some separately and it is usable on the front and rear axles.
Source: Samix [rcsamix.com]