[Nineteen89]

Please correct me if I'm wrong, but in this picture and in some other's I've seen, it seems as though people are putting on just a front spoiler kind of thing under their stock bumper to make it look lowered/'aftermarket.'

I'll attach a photo of what I'm talking about.

If I'm not mistaken, this would just attach or bolt-on under the stock one?
This might be a known modification but I've just never heard anything about it.