JKs are porky. Anything we can do to lighten the load enhances performance. Teraflex manufactures these very cool aluminum rocker guards. I was leery of their strength, but have a friend who isn't the best driver off-road. He has a pair of these rocker guards and proceeded to bash his way down a canyon, hitting them with every sway of the body. While rocks gouged the aluminum a bit, the guards didn't bend and kept harm from his Jeep. I was sold. They're extremely lightweight and strong. Kudos to Teraflex for building strong aluminum JK parts.