The introduction of our unique cross drilled and slotted design increases the number of exit points, allowing more brake pad friction dust and gases to escape through both the cross drilled holes and slots, resulting in better braking performance. While providing a similar performance benefit to the T2 slot, the X Gold is a popular alternative for open wheel and show cars. We recommend the T2 slot design for more intensive braking applications. DBA's X Street Series rotors are designed for daily drivers who want the look of a performance rotor at a reasonable price. Featuring Kangaroo Paw ventilation and a unique drill & slot pattern, they may be available in black or gold. DBA's Street Series rotors feature: Kangaroo Paw ventilation-144 diamond and tear drop pillar ventilation system increases surface area resulting in greater heat dissipation This results in increased braking effectiveness and reduced brake fade, Direct replacement suitability, CBN -Cubic Boron Nitride machined turned provides lower Disc Thickness Variation and parallelism resulting in less occurrence of brake shudder, Moisture proof corrosion protection packaging