I've taken some more pics since there seems to be a lot of interst on the Chin spoiler. Also, I did here on this forum that the chin spoiler was not compatible w/the G35x, but before I had it installed by the dealer, he called the factory rep and it was indeed for all sedan models - no modification needed, this is a direct bolt-on accessory.

The pics were taken in the late evening so there is some flash color in the photos.