Premium Drilled and Slotted Vented Rear Driver Side Brake Rotor (633-72040L) by Dynamic Friction Company®. Quantity: 1 Per Pack. Premium G3000/G11H18 Iron Castings for Strength, Stability, and Durability. Each rotor passes a 100% electronic inspection station that measures over 20 attributes to ensure that each rotor meets OE specifications.