Rotor Style: Drilled Brake Rotors. 2 pcs Rear Brake Rotors(Left+Right). COMPATIBILITY OF THE BRAKE ROTORS. Brake Rotors Material: Cast from OE Grade Alloy. Rotor Type: Disc Brake Rotors. ✔ Higher Safety: Slotted and drilled holes designs will accelerate the dust off, increase the braking performance and can keep the wheels clean.