Stable brake disc SERIES ORO PRIME LINE. Brembo Serie Oro brake discs are fully interchangeable with the original equipped brake disc. The stable Serie Oro discs are manufactured from a single piece of stainless steel. The special design of Brembo discs allows for more effective transmission of braking torque, providing better resistance to thermal and mechanical stresses. The Serie Oro was the series with which Brembo entered the racing world in the mid-1970s, establishing an industrial standard for discs.