Give an addon car that has only its high model its medium, low and very low LODs (L1, L2, L3) and its wheels', so it stops popping and eating FPS far away.
Loading Vehicle LOD Builder…
Most addon cars ship with only their high model (L0). Far away the game still draws every triangle of it, so a street with a few of them costs FPS, and the car pops or loses textures as it streams. Vehicle LOD Builder makes the medium, low and very low models the game expects (L1, L2 and L3) and the wheels' medium and low ones, from the high model.
It works part by part, the way Rockstar's cars are built: a door, the bonnet or a bumper is made lighter on its own, so nothing tears away from the body when a door opens, and the paint, liveries and textures stay as they were. The far LODs leave out what Rockstar's leave out (dials, steering wheel, hubs, suspension, engine). Drop one car or a whole pack: the report shows each LOD's triangles before and after, free, and you check every new LOD in 3D before downloading the .yft.
You get: The same .yft with its new LODs, and a report of each LOD's triangles before and after (a whole pack in one .zip with Batch mode).
Every tool is free to try: 5 exports a day, files up to 25 MB. The paid plans raise the limits. See the plans.

Vehicle Pack CheckFind missing meta files, wrong names and stream mistakes in a vehicle resource.
YFT Part WorkbenchSee a vehicle's parts: every bone by kind (doors, lights, sirens, extras, mod bones), how much hangs on each, and what a road car has that it lacks.
Server BudgetDrop your whole resources folder: the memory each resource streams, the oversized files FiveM warns about, and files streamed twice.
Prop LOD BuilderGive a prop that has only one level of detail its medium, low and very low models, so it costs less far away.