Bluestuff NDX is a high friction sport and race material that can be used for aggressive street driving and certain types of track use. The material has had much success on the track with quality aftermarket calipers (Multi piston systems with better release and cooling and larger rotors) and limited success with street based calipers where pad size and caliper drag can challenge any brake material. The biggest advantage of EBC Bluestuff NDX is their bite from cold and progressive brake feel and the ability to bring a car to a complete stop. This has led to the ECE R90 brake safety regulation approval of R90 which is now completed and certificates are being obtained (during July 2011). There are certain older street based caliper systems where even the new Bluestuff will have trouble handling the caliper and slider drag inherent in the systems but this scenario is exactly the same for our competitors. There is NO material that will be PERFECT on the track in all older street based caliper systems. The Bluestuff NDX is a high friction sport and race material that can be used for aggressive street driving and track applications where longevity and performance is a must. Superb for sports cars, imports, and muscle cars alike. DO NOT FIT UPGRADE PADS TO REAR OF VEHICLE UNLESS SAME UPGRADE FITTED TO FRONT REAR 2010 thru 2011 AUDI S5 Cabriolet 3.0 Supercharged Fitment: 2008 Audi A5 Quattro Base 2008 Audi S4 Avant 2008 Audi S4 Base 2008 Audi S4 Cabriolet 2008 Audi S5 Base 2009 Audi A4 Base 2009 Audi A4 Cabriolet 2009 Audi A4 Quattro Avant 2009 Audi A4 Quattro Base 2009 Audi A4 Quattro Cabriolet 2009 Audi A5 Quattro Base 2009 Audi S4 Cabriolet 2009 Audi S5 Base 2010 Audi A4 Base 2010 Audi A4 Quattro Avant 2010 Audi A4 Quattro Base 2010 Audi A5 Cabriolet 2010 Audi A5 Quattro Base 2010 Audi A5 Quattro Cabriolet 2010 Audi S4 Base 2010 Audi S5 Base 2010 Audi S5 Cabriolet 2011 Audi A4 Base 2011 Audi A4 Quattro Avant 2011 Audi A4 Quattro Base 2011 Audi A5 Cabriolet 2011 Audi A5 Quattro Base 2011 Audi A5 Quattro Cabriolet 2011 Audi S4 Base 2011 Audi S5 Base 2011 Audi S5 Cabriolet 2012 Audi A4 Base 2012 Audi A4 Quattro Avant 2012 Audi A4 Quattro Base 2012 Audi A5 Cabriolet 2012 Audi A5 Quattro Base 2012 Audi A5 Quattro Cabriolet 2012 Audi S4 Base 2012 Audi S5 Base 2012 Audi S5 Cabriolet 2013 Audi A4 Base 2013 Audi A4 Quattro Base 2013 Audi A5 Cabriolet 2013 Audi A5 Quattro Base 2013 Audi A5 Quattro Cabriolet 2013 Audi allroad Premium 2013 Audi allroad Premium Plus 2013 Audi allroad Prestige 2013 Audi S4 Base 2013 Audi S5 Base 2013 Audi S5 Cabriolet 2014 Audi A4 Base 2014 Audi A4 Quattro Base 2014 Audi A5 Cabriolet 2014 Audi A5 Quattro Base 2014 Audi A5 Quattro Cabriolet 2014 Audi allroad Premium 2014 Audi allroad Premium Plus 2014 Audi allroad Prestige 2014 Audi S4 Premium Plus 2014 Audi S4 Prestige 2014 Audi S5 Premium Plus 2014 Audi S5 Prestige 2015 Audi A4 Premium 2015 Audi A4 Premium Plus 2015 Audi A4 Prestige 2015 Audi A4 Quattro Premium 2015 Audi A4 Quattro Premium Plus 2015 Audi A4 Quattro Prestige 2015 Audi A5 Quattro Premium 2015 Audi A5 Quattro Premium Plus 2015 Audi A5 Quattro Prestige 2015 Audi allroad Premium 2015 Audi allroad Premium Plus 2015 Audi allroad Prestige 2015 Audi S4 Premium Plus 2015 Audi S4 Prestige 2015 Audi S5 Premium Plus 2015 Audi S5 Prestige 2016 Audi A4 Premium 2016 Audi A4 Premium Plus 2016 Audi A4 Quattro Premium 2016 Audi A4 Quattro Premium Plus 2016 Audi A5 Quattro Premium 2016 Audi A5 Quattro Premium Plus 2016 Audi allroad Premium 2016 Audi allroad Premium Plus 2016 Audi S4 Premium Plus 2016 Audi S4 Prestige 2016 Audi S5 Premium Plus 2016 Audi S5 Prestige 2017 Audi A5 Quattro Sport 2017 Audi S5 Base