I had to run extended bump stops on the rear of my XK. If not I would rip the rear flares right of when it articulates. On my old setup the BDS rear spacer acted like a bump stop spacer. But when I swapped in the OME coils the bump stop went back to how it was prior to being lifted. I know he has a WK but the last thing you want to do it tear up a set of brand new tires cause your rubbing on the inside of the fender