I guess they call it a bumper finisher. Same one on the Mugen fit. The part that attatches to the bottom of the hatch to make the rear bumper look full.

Are these available? I was going to do a search but I don't know what exactly what it's called.

 

I think its called a bumper sill, but I know the mugen one only fits jdm bumpers so I think were gonna have to wait till someone here makes em

 

Yeah I knew the JDM one wouldn't fit. I might just have to go get some foam blocks and fiberglass to make my own.. haha.

 

It's called the mugen tail gate garnish.