Ive seen this on a few servers (vstancer)

[demonessdemoness]

[Release][C#] VStancer

VStancer Master Development [Build status] [Build status] Description An attempt to use the features from ikt’s VStancer as resource for FiveM servers to synchronize the edited vehicles with all the players. It is built using FiveM API and MenuAPI. When a client edits a vehicle, it will be automatically synchronized with all the players. If a vehicle is reset to the default values it will stop from being synchronized. The synchronization is made using decorators. The default key t…

pretty simple google search found it.