DBA Brake Rotors - Slot & Drilled 4979XS 4000 Series Rotor - Cross Drilled/Slotted Uni-Directional Rotor DBA's 4000 Series XS rotors feature our best technology & materials for maximum performance. High carbon & heat treated iron, patented Kangaroo Paw ventilation and a unique drill & slot pattern makes the perfect direct replacement rotor. DBA 03-06 BMW Z4 2.5L Front Drilled & Slotted 4000 Series Rotor
