TRAXXAS TRX4 TRAIL CRAWLER Brass Front Bumper Mount +25T Aluminum Servo Horn by GPM TRX4331FX25T  [TRX4331FX25T]

Front bumper mount and 25T servo horn set

This 19 pcs upgrade set is an RC-scale accessory designed for the TRAXXAS TRX4 TRAIL CRAWLER chassis, combining a brass front bumper mount with a 25T aluminum servo horn. The components address mounting stability at the front end and provide a metal servo arm option for setups that need firmer linkages or alternative horn geometry without implying changes to full-size vehicles.

Materials are specified in the product name: a brass front bumper mount for added mass and rigidity at the bumper area, and a 25T aluminum servo horn for metal-to-metal interface at the servo spline. The set is intended to integrate with the TRX4 front assembly and the vehicle's existing steering servo where the spline and mounting points match the TRX4 standard.

Installation and tuning role: the brass mount locates the bumper and related hardware with a stiffer base than common plastic parts, while the aluminum 25T horn replaces the factory plastic horn to reduce flex at the servo output. Use this combination when you need a firmer front-end mounting solution and a precise servo arm profile for steering geometry adjustments. Verify spline count and clearance before finalizing installation to ensure full range of motion and to avoid binding.

This set is a straightforward metal upgrade for TRX4 owners who want a heavier front mount and a durable 25T aluminum horn to refine steering response and mounting stiffness in crawl and trail setups.