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 into manufacturing tolerances, the special design of Brembo discs allows for more effective transfer of braking torque, while also offering better resistance to thermal and mechanical stresses. The Serie Oro was the line with which Brembo entered the racing world in the mid-1970s, quickly establishing itself as an industry benchmark for discs.