For enthusiasts focused on setup refinement, the Arrowmax AM-920014 topdeck gives a clear tuning point for Xray T4 FWD chassis behaviour. The 2.0mm rear plate helps manage flex to sharpen turn-in and mid-corner traction.
Install the topdeck using the stock mounting locations, then run a few controlled laps to judge changes. Check mounting screws after the first outings and re-tension as needed to prevent unwanted play.
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