Yeah I think he is talking about the front valence. I did that and duhockey did this too I am pretty sure. Its really simple and I don't think it looks bad.
I had a little rubbing when I first got my tires so I took it off which I thought was a better idea at the time than trimming. Anyways i took a big hit from prerunning and the tire came up and bent the metal down. I had an extra bumper and left the valance on but trimmed it so the plastic acted as a buffer.
Anyways! Long story short for the majority of people its easy, looks decent, and is a good way to improve approach angle and avoid rubbing.