EBC Yellowstuff rear brake pads for 2013–2015 Porsche 911 (991) GT3 3.8 (cast iron rotors only) use an aramid-fiber compound that delivers strong braking effect from cold and increases under heat, making them suitable for both street and track use. These pads are rotor-friendly and have seen extensive competition use, but they are not a low-dust formulation.
EBC 13-15 Porsche 911 (991) (Cast Iron Rotor only) 3.8 GT3 Yellowstuff Rear Brake Pads