The DBA 4000 Series plain rear rotor for 2006–2007 Subaru Impreza WRX is a direct-replacement rotor cast from XG-150 high-carbon alloyed iron and processed with Thermal Stability Profiling to manage heat and stress from repeated heavy braking. DBA's Kangaroo Paw ventilation employs 144 diamond and teardrop pillars to increase surface area and improve cooling efficiency compared with straight-vane rotors, while the HD plain face preserves an OE-style finish.
DBA 06-07 Subaru Impreza WRX Rear 4000 Series Plain Rotor