The Z/28 is the only GM car, and we think one of the only production cars, to run 305mm-wide tires up front. To save weight, GM also shrunk the wheel diameter to 19 inches. Since the Camaro was designed around a 20-inch wheel, this created a larger-than-optimal tire-to-fender gap. The way to fix this and keep the tires from sticking out past the fenders, was to add fender lips. We imagine these will be big sellers in the aftermarket.