This Factory Pro option upper deck is a scale replacement built for the XRAY T4-20 chassis. It acts as an alternate mid-chassis mounting and stiffness component for racers adjusting balance and steering sensitivity.
The unit installs in the original upper-deck position and uses the T4-20 factory mounting locations, so additional brackets are not required. Installation normally means removing the stock upper deck and transferring the factory fasteners while keeping screw placement and torque settings to ensure reliable alignment.
In setup terms the Scythe Type deck serves as a chassis rigidity control: swapping to this option modifies upper-deck behaviour and can influence how the car shifts weight during corner entry and while on-throttle. Use this deck together with spring and damper changes, anti-roll bar tweaks, and tyre choices to develop a cohesive setup.
This direct-fit option gives XRAY T4-20 operators another setup variable to explore; test in controlled sessions and combine with suspension and tyre changes to quantify improvements.
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