Replace the plastic outer portal housings on a Traxxas TRX4 with the GPM Aluminum Outer Portal Drive Housing to better stabilise inner gear movement in front and rear knuckles. Made from 6061 T6 aluminium, it gives a lighter but stronger option that supports smoother gear engagement while remaining compatible with the original plastic parts. The streamlined 3D profile facilitates a straightforward plug-and-play installation for faster upgrades.
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