The UK EFI Bristol factory of EBC Brakes has used new ECO friendly technology to develop a brake pad that has unusually high friction levels yet still has good manners for street use with brake effect being strong from cold when the brake is first applied. The race pedigree of the material used also guarantees effective stopping up to temperatures exceeding 1400 F well above the maximum experienced in heavy braking, towing or downhill descents. Winter testing in Ohio on a fleet five popular light trucks showed us the proof on cold braking in the worst wet and cold conditions where many performance brakes would not even start to show good brake effect. So these are pads that have an extremely wide range of usability. The new carbon granule based Extra Duty material is also rotor friendly, minimal in dust and noiseless and each set is supplied with revolutionary NUCAP piston insert shims, another first from EBC Truck/SUV Extra Duty Brake Pads; FMSI Pad No. D883; Vented; 325mm Dia.; 85mm Height; 20mm Thick; 78.7mm Center Hole Dia.; Pad Dimensions: 137 x 47 x 18mm; 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 Rear Orangestuff Race Brake Pads FMSI D883 2007 thru 2016 GMC Acadia (1st Gen) 3.6