the sides are standard, and fit both the 2wd & 4wd end caps, it is roughly 2 inches lower than the stock valance.
here is a pic of the side after I cut it...
and a couple where it is installed, but not moulded in yet.
compare it to the pic on stillen's site or street scene and you'll be able to tell where it was modified. I did this so that the relief in the stock bumper end caps would still be visible, if not it would have covered it up.