Access Mud Flaps A10200913 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 3XL ROCKSTAR" Mud Flap 3XL; Smooth Mill; Access Rockstar 3XL 2019+ Chevy/GMC Full Size 1500 Smooth Mill Hitch Mounted Mud Flaps