This Factory Pro option part is a narrow split upper deck front designed specifically for the XRAY X4 chassis, supplied as an RC-scale graphite 2.0 replacement component. It modifies front-end stiffness and redistributes structural rigidity across the top of the chassis to support setup tweaks while keeping the stock lower plate unchanged.
Fitment uses the X4's existing mounting points and orientation for the front upper deck; the component is a direct replacement for the original front upper plate. During installation make sure the deck clears the servo and suspension links, tighten hardware progressively and recheck wheel toe and steering geometry after final assembly.
Tuning notes: a narrower split upper deck front shifts flex ahead of the centreline, which can change initial turn-in and mid-corner stability. Install this graphite piece when you want a measurable front-end response difference, then judge effects by lap times and tyre wear.
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