The rubber j shaped piece that fills in the gap between the bumper and fender. If you zoom in a little on my pic you'll notice i got it on the back side of the metal fender tab. I couldnt remember if it went that way or in front of it. Also what is the gap supposed to be going across the bumper where it meets the hood and fender? Im trying to get it to fit as close as i can but the hood keeps coming in contact with the bumper.