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This is the ST Racing CNC Machined Brass Diff Cover for the Traxxas TRX-4M. Brass components helps with the performance of your TRX-4M by adding weight strategically at the lower portion of the vehicle, while increasing the durability of your TRX-4M as well. These brass Diff Covers not only adds more weight to the axle for stability, but also helps strength and align the internal gears inside the axle.
