This Factory Pro O-XCP013 brace set is an RC-scale front upper deck reinforcement made for the Xray X4 chassis. The pair of thickness options lets you change front stiffness easily without altering the main chassis plate, aimed at small, controlled changes to steering feel and overall balance.
The kit includes two discrete braces: a 1mm piece and a 2mm piece, one of each, so you can swap them quickly during setup sessions. Use the thinner plate to retain more front flex and the thicker plate when you need extra front-end rigidity. These braces are shaped to match the X4 front upper deck mounting points for straightforward replacement or stacking against the existing deck.
Installation note: this brace set is designed to work with the stock X4 front upper deck and standard fastener positions. Check hole alignment and clearance before final tightening, and try changes on the track to confirm handling direction and balance shifts.
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