Sorry about that, I did get this off the internet and it is an STl, but I need to put wholes in the back of the car or at least some kind of slots, unfortunatly the surface of the car is curved and I cannot just put my holes in. I tried erasing the back of the car and reattaching the car, but it doesnt register as faces when I attach all of the lines together, can you help me, Email me at GenZod23@gmail.com for copy of the car please