DBA's mid-series enhanced performance rotor features Thermal Stability Profiling for improved heat handling. Thermo-Graphic paint markings on the rotor allot for effective heat monitoring, when the painted lines change color you can see the temperature that the rotors have reached allowing you to accurately match the proper brake pad compound. The 4000 drilled rotors have a unique slot and drill design which allows for the gasses to escape that are trapped between the pad and the rotor, which ensures consistent contact.
WRX owners upgrading to the STI Brembo Brakes will want to use these rotors because of their dual bolt pattern.
Note: Not recommended for Track use. If you are looking for a track rotor, we would highly recommend the T3 slotted only versions of the DBA 4000 & 5000 Series.