Xray X4 Series Rear Upper Deck Narrow Split Graphite 2.0 - Factory Pro O-XCP028  [FP-O-XCP028]

Overview of the narrow split rear deck

This Factory Pro rear upper deck is an RC-scale replacement part for the Xray X4 Series chassis, produced in Graphite 2.0 to change local stiffness at the rear for tuning purposes. The item is aimed at racers and hobbyists who adjust chassis balance and tyre bite by varying rear upper deck stiffness and load paths, rather than those seeking a routine component swap.

Fitment and role: located at the rear upper deck position on X4 Series frames, the plate functions as a tuning component for rear chassis rigidity. Replacing the stock deck alters the response of the rear suspension and chassis during cornering and acceleration, letting users make fine setup changes while leaving suspension geometry untouched.

Installation notes: install with the original X4 rear upper deck mounting points, confirm hole alignment and clearances before fully tightening, and follow the same hardware pattern as the OEM plate. Keep fasteners snug and inspect after the first run to ensure alignment has not moved and handling remains consistent.

Tuning guidance: employ the Graphite 2.0 deck to increase local rear stiffness for tracks that require steadier high-speed handling, or to adjust rotation by combining different materials between front and rear decks. The effect is primarily at chassis level rather than directly on individual suspension parts.