I have some pics of an original hemi challenger with 15 " fenders on it. They should be the same. It has the braces cut out that are in the middle of the challenger fender. I have heard that is the difference as well. On the AAR. I have two cars both with original fenders. One has rolled fenders and one does not. One has a replacement fender that still has the part number visible and it has the rolled lip. I heard that the test cars may have had a little interference problems so they made the mods just in case. Mine have never rubbed on the car with out the rolled lips.