EBC's BSD rotors feature a 'V' pattern which improves heat dispersion and helps the pads run cooler on average over OE style rotors. BSD rotors are a perfect addition to any vehicle looking to add performance and style to any vehicle. EBC's BSD rotors feature a V pattern which improves heat dispersion and helps the pads run cooler on average over OE style rotors. BSD rotors are a perfect addition to any vehicle looking to add performance and style to any vehicle. DO NOT FIT UPGRADE PADS TO REAR OF VEHICLE UNLESS SAME UPGRADE FITTED TO FRONT, The Thermic Black coating? does NOT need to be removed before install. Do NOT use brake cleaner or any other method to remove Thermic Black coating from discs rotors. The Thermic black coating will be removed in the pad swept area by the brake pads with in the first 10 to 20 stops made after installation on the vehicle.The Thermic Black coating? is an anti corrosion coating for long resistance against rust. Attempting to remove Thermic Black Coating with brake cleaner or any other method is NOT covered under EBC warranty 2008 thru 2013 GMC Sierra 1500 1/2 Ton 2WD/4WD with rear rotors