Rotor / Disc /Hub FEATURES 1) Slotted Drilled and Vented Design From Jingheng Auto Parts. Rotor surface temperatures,which rise rapidly from repeated ... down to acceptable levels only by using a ventilated rotor to allow heat to escape,Less expensive,non- ... ventilated rotors overheat,causing rapid brake pad deterioration, excessive rotor surface wear,and warping. Manufactured From Cast Iron, Cast ...