Here's a shot of my last YJ with Bushwacker, pocket style, fender flares and rock slides:
This is my current YJ with trimmed OEM flares and rock slides:
That should give you a good idea of what rock slides are. They are body protection as well as have an integrated step/guard.
1995 Blue YJ i-4 AX-5 33" Cepek Crushers on 2.5" Rancho lift - SOLD October 2010
1996 White ZJ i-6 auto bone stock
1987 Maroon YJ i-6 Auto (1.5" body lift. OME 2 1/2" lift. Rancho RS5000 shocks. Rancho steering stabilizer. A-Z Fabrication rock slides. More upgrades coming soon - LOL)
The "sideways" build thread: http://www.jeepforum.com/forum/f22/r...hread-2164793/