EBC Racing 13-14 Audi RS7 4.0L Twin Turbo (Cast Iron Rotors w/Round Weights) 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. Installation Instructions This Part Fits: Year Make Model Submodel 2014 2018 Audi RS7 Base