I'll be a nice guy and comment.

I'm surprised you used that body kit and even more surprised that it looks so good on the mazda!
The one thing that annoys me the most is probably the atmosphere, the background is nice and all but the picture is too dark. I have photoshop open at the moment so I pasted it there, pressed CTRL+L (levels) and played around for a bit. Try setting the left slider to 20, middle to 0.90 and right slider to 255. I think that looks a lot better.

If you can't see the transition from the tyres and the shadows under the car your screen is too bright.