Manufactured using premium disc blanks mentioned above, the narrower multi-slot design of the Ultimax sport rotor and the progressive angle at which the slots are machined creates a quiet running sport rotor that still has the benefits of removing gas, dirt, water, and debris and maintaining parallel pad wear.

EBC have always been honest enough to say that the biggest advantage of slotted rotors is that they promote flat and parallel pad wear rather than allowing ridges to develop on pads and rotors, which is typical of “drilled only” sport rotors. By preventing these ridges, brakes stay more consistent throughout the pad and rotor wear life (simple physics!).

Note: 

The Thermic black coating will be removed in the pad swept area by the brake pads with in the first 10 to 20 stops made after installation on the vehicle