[Ayumi]

When you say "individual car velocity" - do you mean a vehicle model or actual individual cars? (Depending on how you do it, it is possible).

Secondly, what I think you're looking for is SetObjectMaterial (https://sampwiki.blast.hk/wiki/SetObjectMaterial) - which allows you to change the indexing textures of one object to another.

Lastly; are you referring to using the audio streaming feature with ******* links that pull from a database directly?