EBC Racing 2017+ Audi RS3 2.5L Turbo RP-X Front Brake PadsRP X(TM) Racing Front Brake Pads by EBC(R). EBC Racings RP X compound is an ultra high performance track and race pad designed for performance vehicles driven hard on track and for dedicated race cars. RP X has a very stable friction coefficient of 0. 55 mu up to and beyond 850 C, making it an excellent performer for even the most demanding vehicle applications. This Part Fits: Year Make Model Submodel 2010 2011 Audi A6 Quattro Base 2010 2012 Audi A8