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 2008 - 2017 Audi A5 Quattro, 2009 - 2016 Audi A4 Quattro, 2009 - 2017 Audi A5, 2009 - 2018 Audi A4, 2009 - 2018 Audi Q5, 2011 - 2018 Audi A7 Quattro, 2012 - 2013 Audi A6, 2013 - 2013 Audi A6 Quattro, 2013 - 2015 Audi A4 allroad, 2013 - 2015 Audi allroad, 2018 - 2018 Audi A7