You either need a __resource.lua or fxmanifest.lua to make any script/car work with fivem. Im not sure what your on my man but I recommend looking over fivem's tos before you go around spreading false info.
Link: https://docs.fivem.net/docs/scripting-reference/resource-manifest/resource-manifest/
Also fxmanifest.lua is the newer version of __resource.lua but they both work.