This unit is an RC-scale replacement aimed at upgrading the rear body post mount on XRAY X4 chassis using a 112mm hole spacing. The Factory Pro O-XCP012 set is intended to reduce rear-body movement so shells stay settled through corners and fast straights.
The part is compatible only with XRAY X4 configurations that have rear post holes spaced at 112mm. It acts as a receiving mount for standard body posts and works with existing chassis mounting points and body clips without altering suspension or chassis geometry.
Fitting is straightforward: remove the body, position the holder to match the 112mm spacing, secure it with appropriate screws, then refit body posts and check alignment. Standard hex drivers are all that is required; avoid over-torquing to prevent damage to the holder or chassis mount bosses.
In practice the holder helps maintain consistent shell positioning between practice and race runs, which can make aerodynamic response and balance more consistent when making setup changes. It is useful for those who frequently swap shells or refine rear-end fitment for better repeatability.
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