XRAY X4F'25 Rear Upper Deck Hard Graphite 2.5 for Race Setup - Factory Pro O-XCP023H  [FP-O-XCP023H]

Rear upper deck tailored for XRAY X4F'25

Designed for the XRAY X4F'25 chassis and produced by Factory Pro as model O-XCP023H, this hard rear upper deck in graphite 2.5 is used to reduce chassis flex and sharpen the rear-end response of the car.

The upgrade raises torsional stiffness at the rear, which affects steering entry and mid-corner behaviour. A stiffer rear deck is a common solution to cut unwanted flex during acceleration or heavy cornering, delivering a more predictable rear feel without altering primary components.

Installation guidance: the part mounts to the standard X4F'25 screw points and uses the stock mounting layout, so no chassis alteration is needed. Check and replace any damaged screws or threads before refitting and tighten fasteners evenly to avoid distortion. After fitment, verify clearance with the motor and that suspension travel is unobstructed.

Setup guidance: after switching to the graphite 2.5 hard deck, apply modest changes to rear suspension and anti-roll settings. Observe tyre wear and handling over a few runs to decide if damping, toe or roll centre adjustments are required to restore balance.