Centric 125 Series High Carbon Alloy Brake Rotors contain an advanced metallurgy that greatly reduces the possibility of pad squeal especially with higher friction, European style brake pad compounds. Proprietary Molybdenum and Chromium alloys resist rotor cracking during high performance use or repeat stop situations. This alloy also increases the friction couple improving brake performance and stopping power. Increased Chromium and Carbon content is also more resistant to oxidation. Centric Premium Rotor with advanced metallurgy that greatly reduces pad squeal; Especially effective with higher friction, European style brake pad compounds; Added Molybdenum and Chromium to resist rotor cracking 2010 - 2018 Audi S4, 2011 - 2018 Audi A7 Quattro, 2011 - 2018 Audi S5, 2012 - 2018 Audi A6 Quattro, 2013 - 2018 Audi A8 Quattro, 2013 - 2018 Audi Q5, 2014 - 2018 Audi A6, 2014 - 2018 Audi SQ5, 2015 - 2016 Audi A8, 2015 - 2017 Porsche Macan, 2016 - 2016 Audi S7, 2016 - 2018 Audi A5, 2016 - 2018 Audi A7, 2016 - 2018 Audi Q7, 2017 - 2017 Audi A4, 2017 - 2017 Audi A4 allroad, 2017 - 2018 Audi A4 Quattro, 2018 - 2018 Audi A5 Quattro