Stable brake disc SERIE ORO PRIME LINE. Brembo Serie Oro brake discs are fully interchangeable with the original equipped brake disc. The Serie Oro fixed discs are made from a single piece of stainless steel. As a result of specific research on tolerances during manufacturing, the specialized design of Brembo discs allows for more effective transmission of braking torque, while also providing better resistance to thermal and mechanical stresses.