The DBA 5000 Series Slotted 2 Piece Front Rotor w/ Black Hat for 2018-2021 STI is designed with T3 Slot 48 precision CNC machined slots and Kangaroo Paw 144 diamond teardrop pillar ventilation system. These features provide vibration-dampening, quieter brakes, and improved responsiveness with increased surface area for greater heat dissipation to minimize brake fade and enhance braking performance. Constructed with XG150 High Carbon Alloyed Iron, the rotor is designed to handle extreme temperatures with reliability.