What is the difference between Brembo drilled and slotted discs?
Drilled Brembo Sport Discs will operate at a slightly cooler temperature than the slotted version disc because of the added air surface created by the drill pattern. Slotted Brembo Sport Discs are recommended when using racing brake pad materials or the vehicle is submitted to extreme braking duties such as towing or hauling heavy loads. Both designs were engineered by Brembo to improve pad “bite”, improve wet weather performance, continuously refresh the brake pad and prevent gas from building up between the brake pad and disc.
You should ALWAYS fit new brake pads when installing new brakes discs