i have see in many pics on g35 coupes that they add in the stock front bumper some kind of inserts in the two openings of the bumper like two covers. if anyone knows what i'm talking about and can help me, and tell me where i could find those to buy. i just love that but i haven't been able to find it to buy it.

 

They are called 'ings face ducts'.
Look up silverbolt, he has them.

https://g35driver.com/forums/interior-exterior/81792-face-duct-review.html