Xray X4 Rear Narrow Split Upper Deck Graphite 2.0 - Factory Pro O-XCP016  [FP-O-XCP016]

This Factory Pro O-XCP016 option part is a rear narrow split upper deck made as an aftermarket tuning piece for the Xray X4 chassis, manufactured from Graphite 2.0. It gives an alternative rear top-deck stiffness profile so tuners can shift chassis balance and rear traction cues without changing suspension geometry.

Fitment is straightforward for anyone familiar with X4 maintenance: the part replaces the stock rear upper deck position and uses the factory fastener pattern. Basic hex drivers and common workshop tools are sufficient for removal and refit; inspect fasteners and thread engagement when reinstalling to ensure a secure mount.

As a setup element this deck alters how the chassis distributes load during acceleration, braking and cornering. Use it alongside spring, damper and anti-roll bar adjustments as part of a measured tuning approach to improve lap consistency and rear grip on different surfaces.