Thank you. I really like the look of no rear flares. It's something different. They are steel. These are the EVO builder corners or "outlaw" corners which only come in steel. The regular style EVO corners come in steel or aluminum. Here's a couple pics from the front. Hope this helps.

 

How much cutting of the rear wheel well is involved with the rear armor?

 

Just two minor corners and cutting holes for tail lights is all that's needed fore these corners.