This is the basic line of the High Performance Brake Systems program.
It is a braking system consisting of integral discs, available drilled or slotted.
Both drills and slots improve braking consistency, continuously cleaning and refreshing the pad surface. These slots or drilling provide a path to disperse built-up heat and gasses that result from pads acting on the rotors, as well as help to clean and refresh the pad surface.
Both help in interrupting the water film in wet driving conditions, improving the brake response; this effect is more sensitive on cross-drilled discs owing to the different full/empty ratio of the surface and the possibility to have water flowing through theholes in the ventilation gap (on vented discs).
On the other hand, where extreme friction level is required, the adoption of a highly aggressive pad such as in racing applications is necessary and slots are the right solution: being the slots not all through the disc thickness, the overall mechanical resistance of the disc is higher.
Additionally, all of Brembo’s slotted discs are directional: the discs should be installed such that the end of the slot nearest the outer edge of the disc contacts the pad first.