The Tamiya 4004080 wide battery holder is engineered to accept broader battery packs and keep them firmly seated in the TRF417 chassis. Secure mounting reduces the chance of pack movement that can upset the car during cornering.
Keeping the battery fixed improves weight transfer control and makes lap times more consistent by eliminating unpredictable shifts. The holder helps the TRF417 feel more composed under braking and throttle transitions.
Installation is simple and the holder aligns with the TRF417 mounting arrangement, avoiding the need for custom modifications. This makes it a sensible upgrade for racers and weekend tuners alike.
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