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. Symmetric vane, split-core castings for uniform heat distribution. Black E-Coat anti-corrosive coating protects much better than competitors spray paint. Double disc ground friction surface for optimal performance and service life 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 2005 - 2010 Volkswagen Bora, 2006 - 2012 Seat Leon, 2007 - 2009 Volkswagen Eos, 2008 - 2013 Audi A3, 2008 - 2013 Audi A3 Quattro, 2009 - 2010 Volkswagen Passat, 2009 - 2010 Volkswagen Passat CC, 2009 - 2017 Volkswagen CC, 2010 - 2010 Volkswagen GTI, 2010 - 2010 Volkswagen Jetta, 2011 - 2018 Volkswagen Tiguan, 2012 - 2015 Audi Q3, 2015 - 2015 Audi Q3 Quattro