GD850 EBC GD Front Brake Discs Rover 45. EBC Part Code: GD850. EBC GD Discs are manufactured using a high-quality alloy designed to run up to 900 degrees centigrade (glowing red hot). Combine these EBC GD discs with EBC GreenStuff, RedStuff (Ceramic) or YellowStuff pads to increase braking efficiency and reduce stopping distances even more!