The KO Propo RSx one10 Ver.D Aluminum Upper Case, model number 35042, replaces weaker plastic tops with a machined aluminium cover. It is targeted at drivers who want a firmer, more stable servo mounting for competitive or rough-terrain use.
The aluminium case limits movement of the servo housing under load, helping to keep linkages and gears aligned. This improves predictability of steering and throttle inputs when the vehicle is pushed hard.
Confirm your servo model matches the KO Propo fitment list before buying. Installation usually requires only basic tools and a careful hand to transfer linkages and screws from the old case.
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