Fits 2011 GMC Sierra 3500 HD [ SRW ] FRONT PAIR ATL Autosports Performance Brake Rotors ATL55191-17SO Fits the Following Vehicle ONLY: 2011 GMC Sierra 3500 HD [ SRW ] If This Is Not The EXACT Fit For Your Vehicle, Please Contact Us With Your Year, Make, & Model, So We Can Provide You With The Correct ASIN. OE Replacement - Guaranteed To Fit Without Modification - Improved Stopping Power In All Weather Conditions Our Curved "OFF THE EDGE SLOTS", Are State of the Art Technology. They Allow Gases, Debris & Water to Not Just Escape Off the Rotor, But to Be Pulled Away From the Center of Your Braking System As You Stop. All Machining Done In The USA - Silver Zinc Plated To Inhibit Rust