All EBC rotors are made from OE spec grey cast iron, exactly as used on new car production and as many as we have tools for are BRITISH MADE wholly in our own UK foundry. Currently EVERY SINGLE ROTOR sold in Europe and the UK is BRITISH MADE and a majority of the designs specific to the USA are also BRITISH made.The British foundry is constantly expanding its in house tooled range but EBC like every brake manufacturer ....does need occasionally to buy some rotors in from approved sources to complete ranges in overseas markets. None of our competitors will ever tell you where their rotors come from and we at EBC are as disappointed as the rest of the world that cost pressure means there is not ONE foundry left in the USA to supply such parts, other brake brands when asked about origin will just sidestep the question. When we do buy rotors in, they are specified, sampled, tested for element analysis, grain structure, tensile strength, hardness and optimum ductility and tested 100 piece by piece to be perfect for runout on this in house machine. EBC s GD sport rotors features wide aperture slots for cooling to reduce temperatures preventing brake fade. Dimple drilling avoids stress cracks with Thermic black finish with a sleek look whilst preventing corrosion. EBC's GD sport rotors features wide aperture slots for cooling to reduce temperatures preventing brake fade. Dimple drilling avoids stress cracks with Thermic black finish with a sleek look whilst preventing corrosion. FMSI - Front 2017 and up AUDI A4 2.0 Turbo (B9) Fitment: 2017 Audi A4 Premium 2017 Audi A4 Premium Plus 2017 Audi A4 Prestige 2017 Audi A4 allroad Premium 2017 Audi A4 allroad Premium Plus 2017 Audi A4 allroad Prestige 2017 Audi A4 Quattro Premium 2017 Audi A4 Quattro Premium Plus 2017 Audi A4 Quattro Prestige 2018 Audi A4 Premium 2018 Audi A4 Premium Plus 2018 Audi A4 Prestige 2018 Audi A4 allroad Premium 2018 Audi A4 allroad Premium Plus 2018 Audi A4 allroad Prestige 2018 Audi A4 Quattro Premium 2018 Audi A4 Quattro Premium Plus 2018 Audi A4 Quattro Prestige 2019 Audi A4 Premium 2019 Audi A4 Premium Plus 2019 Audi A4 Prestige 2019 Audi A4 Titanium 2019 Audi A4 allroad Premium 2019 Audi A4 allroad Premium Plus 2019 Audi A4 allroad Prestige 2019 Audi A4 Quattro Premium 2019 Audi A4 Quattro Premium Plus 2019 Audi A4 Quattro Prestige 2020 Audi A4 Premium 2020 Audi A4 Premium Plus 2020 Audi A4 Prestige 2020 Audi A4 allroad Premium 2020 Audi A4 allroad Premium Plus 2020 Audi A4 allroad Prestige 2020 Audi A4 Quattro Premium 2020 Audi A4 Quattro Premium Plus 2020 Audi A4 Quattro Prestige