Unscrew all the clips and pull them out, then slide the skirts forward and they should pop off. The clips have a plastic screw in them, once you unscrew it and pull it out, the outside of the clips pop out as well.
take all the screws out from underneath and take the screw that holds it in the front where the wheels are at. then take a hammer and slightly hit the back of the side skirts towards to the front of the car. it should slide off after that.
oops, i didnt mean the side skirts, i meant the oem lip kit sides. i unscrewed all the screws from it but its still doesnt seem to want to come out easily. theres no way for it to slide foward and i dont want to just yank it out. my friend checked it out and was saying that i may need a rivet buster to get it out. has anyone else have to do this?