i would recommend adding the classic rims to it the round silver ones... and tyres with the white line around them...
also if you could manage to merge the bonnet of the car with the grill in a single smooth slope that would make it look much better..
and how about you change the color scheme of the car... like stripes or change the roof color...
you need to change the rear though.. seriously..
and @tayyeb: good photoshop..