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

Narrow split rear upper deck details

This Factory Pro upper deck replaces the rear upper plate on Xray X4 Series chassis and comes in a Graphite 2.0 construction to shift local stiffness for rear-end tuning. It is intended for hobbyists and competitors who adjust chassis balance and tyre bite by changing upper deck stiffness rather than for generic OEM replacement.

Fitment and role: positioned at the rear upper deck of X4 Series frames, the part serves as a tuning piece to modify rear chassis rigidity. Swapping it in alters how the rear suspension and chassis react under cornering and drive loads, allowing incremental setup changes while leaving geometry intact.

Installation notes: mount using the X4 rear upper deck factory points, check that hole alignment and clearances match before tightening, and retain the original hardware pattern where possible. Fasteners should be snug and rechecked after initial track time to ensure no movement affects handling.

Tuning guidance: deploy the Graphite 2.0 deck to increase rear-local stiffness for tracks needing more high-speed stability, or to tweak rotation when combined with alternate front deck materials. Expect adjustments to chassis flex characteristics rather than direct shocks to individual suspension parts.