T3 4000 Series - T-Slot Uni-Directional Slotted Rotor Front 4000 Series T3 Brake Rotor DBA 01-05 MX-5 Miata Sport Suspension / 04-05 w/ MazdaSpeed Turbo Front Slotted 4000 Series Rotor T3 4000 Series Rotor Brake Rotor DBA's 4000 Series T3 rotors feature our best technology and materials for maximum performance. High carbon & heat treated iron, patented Kangaroo Paw ventilation and Tri-symmetrical slotting makes for the perfect direct replacement rotor 4000 SERIES T3 is the ultimate in direct replacement single piece performance brake rotors Featuring all the benefits of the 4000 Series plus DBA?s patented world renowned T3 bi directional slot design. DBA 4000 Series T3 Brake Rotor T3 4000 Series Slotted Rotor Disc Brake Rotor New AAP