That's the SHADOW model at 13000 polys???????
What a ginormous waste of filespace. The higher the polycount the bigger the model's filespace, and wasting that filespace is what leads to other things getting cut out, especially when it comes to textures.
90% of that model's detail could be removed and you'd still see the same shadow. You don't need tons of delicate detail around the grill, headlights, hood, windshield, engine details, or even a gas cap just for the shadow model.
The only parts that would need any real detail at all are things like mirrors, wings, protruding scoops, things that stick out from the outline of the car. Any details that are set into the surface of the model are simply not needed for a shadow model because they'll never be seen in the shadow because of the angles of the lighting.
I guarantee you I could take no less than 10000 polys out of that model and it wouldn't change the shadow at all.