Pacer Performance 52-118 Flexy Flares Black Rubber Fender Extension Kit - 4 Piece Extends your GMC truck fenderwell a full 2-1/2" Constructed from the finest quality EPDM synthetic rubber, they won't crack or peel in cold weather or droop in high temperatures The exclusive built-in curvature allows the flare to fit the fender wall without wrinkles or buckling Pacer Heavy Duty Flexy Flares are the top of the line for best look and fit Made of heavy duty reinforced steel with a wire insert on the outer edge for added rigidity! The wire can be hand formed to match tight curvatures