4000 Series Rotor - Cross Drilled/Slotted Uni-Directional Rotor Rear 4000 Series XS Gold Brake Rotor DBA 01-05 MX-5 Miata Sport Suspension / 04-05 w/ MazdaSpeed Turbo Rear Drilled & Slotted 4000 Series XS 4000 Series Brake 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. 4000 SERIES XS Gold provides all the benefits of 4000 Series, with a premium non directional cross drilled and slotted design allowing more brake pad friction dust and gases to escape, plus an attractive gold finish on the rotor hub. DBA 4000 Series XS Gold Brake Rotor 4000 Series Drilled/Slotted Rotor Disc Brake Rotor New AAP