Why drilled and slotted rotors are more ineffectual than you think a recent trend in the world of sports cars is using drilled and slotted rotors; List of the cons of drilled and slotted rotors. FRONT + REAR DRILLED SLOTTED BRAKE ROTORS & CERAMIC PADS Why choose drilled & slotted rotors? Why drilled and slotted rotors are bad . Drilled and slotted rotors offer drivers the consistent performance they want without changing the responsiveness of the brake pedal. All the drilled and slotted areas on the braking surface means less metal is available. People have pointed out that slotted. The drilling is to overcome a bad design and cheap tooling of the casting from which the rotors are made from. Additionally, slotted rotors are stronger and less prone to cracking compared to drilled rotors as the structural integrity of the slotted rotors is not compromised during the machining process. You will see these rotors in almost every car today, and despite the fact that they...