Summary

When looking at creations done by @ThatOneGuyWhoDoesThings , I found a Lamborghini Sesto Elemento. However, the tire was in the middle of the the car, the meshes were too thin to print, and stuff like that. I tried to print it and it failed miserably. So I fixed it even more. Currently, it still is not 100% watertight, but at least it doesn't seem to have visible cavities on the body and windshield when I sliced it.

I also was able to remove the tire from the middle and it can be printed 4 times separately. Use wire or metal bars to attach them to the car depending on how big you printed the car.

And BTW, if you want it at a 1/67, scale it at 1510% on Cura. (Note: A real Elemento's length is 180.3 inches or 458 inches).