Replace the stock horn on your Traxxas TRX4 with this 6061 T6 aluminum unit to improve locking differential response without adding unnecessary mass. The integrated spring absorbs hits to help protect the servo during heavy rock crawling.
For a secure mount, tuck the 3mm metal washer under the stainless steel round head screw so the screw head sits flush with the aluminium collar. This stops gaps and keeps the horn firmly in place under load.
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