Access Mud Flaps A10100521 ROCKSTAR(TM) mud flaps are the best fitting hitch mounted mud flaps! The unique model specific design features a custom fit aluminum frame with stabilizer plate, stainless steel hardware and 1/2" rubber flaps. ROCKSTAR" Mud Flap XL ROCKSTAR" Mud Flap XL; Diamond Plate; Hitch Mount; 17.5 in. x 37.88; Access Rockstar 15+ XL F-150 Mud Flaps