Z car
 

an other render, some trouble with the shadow and will change it soon.
comment?

Wow man that's damn good. Once you've got the issue with the shadow figured out (although I'll be damnned if I can spot it), then this is definitely gallery material.

very cool!! great image mate :)

COOOOOLLLL!!!!

Looks good! I love the environment you've put it into as well. You get so many renders from people who just want to show "I can do photorealistic cars" but this render is nice and dynamic - its different - its not just a render of a nice looking car from a fairly standard viewpoint so kudos to you for going down this route. This is the sort of thing I really like to see. Just looks a tiny bit dark right now.

thanks guys for the comments, i only used spot lights with shadow map and point lights also the volumetric lightning, this is the trouble, some objects look weird and get no shadow, any idea?

The first thing I would look at is the size of the shadow maps. If it is set too small for the scene, you can get blotchy results. Try changing it to 2048 or 3096 and see if it changes.