The world's only complete line of direct bolt-on brake discs made in EBC UK manufacturing plant using: Billet-steel rotor rings that deliver 18 percent more stopping power than stainless steel equivalents The steel used in the EBC rotor blades is a stainless blend with higher friction effect than normal heat treated stainless steel found on stock discs EBC rotors are complete bolt-on and go rotor assemblies made with forged aluminum center hubs, high friction billet steel rotor rings and sturdy riveted construction. EBC rotor programs are low carbon steel units zinc plated to minimize corrosion.