StopTech Sport Rotors are also available with an optional cryogenic treatment. Although cryogenic treatment is invisible to the naked eye, many fleet customers are sold on its ability to extend the service life of the brake rotor. Deep cryogenic treatment is a one-time process that permanently improves the performance and wear characteristics of metal components, from brake rotors and engine parts to machine tools and gear sets. All new StopTech Sport Rotors may be ordered with cryogenic treatment for an additional fee. This extra process provides better rotor balance and creates a cleaner, more finished looking component. In addition, Rotors are inspected for balance and mill-corrected to a tolerance of less than 2oz This extra process provides better rotor balance and creates a cleaner; more finished looking component; In addition; Rotors are inspected for balance and mill-corrected to a tolerance of less than 2oz 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