EBC DP41858R 12-15 Porsche 911 (991) (Cast Iron Rotor only) 3.8 Carrera S Yellowstuff Rear Brake PadsEBC DP41858R 12 15 Porsche 911 (991) (Cast Iron Rotor only) 3. 8 Carrera S Yellowstuff Rear Brake Pads Product Information The EBC YellowStuff compound is essentially a race pad but with a big difference in that it works from cold and can be safely used on the highway. If you want the ultimate in high friction braking this is the pad to choose. Brakes feel superb from first touch of the pedal and stay effective up to race temperatures. EBC YellowStuff