The GPM Aluminum Outer Portal Drive Housing is made to fit the Traxxas TRX4 Trail Crawler and replaces weaker plastic housings with 6061 T6 aluminum for better strength and lower weight. This outer housing supports the knuckle arm inner gears, keeping them aligned under load while remaining compatible with the stock plastic components. The 3D streamlined profile and precision cuts simplify installation and maintain clearance for standard hardware.
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