DBA DBA42165XD Series XD Drilled Dimpled Performance Disc Brake Rotor - 4000

The DBA DBA42165XD is a 4000 Series XD performance disc brake rotor from Disc Brakes Australia (DBA), engineered as a direct-fit, single-piece upgrade over standard OE brake rotors. Featuring DBA's signature non-directional cross-drilled and dimpled XD surface finish, this rotor delivers enhanced cooling performance and aggressive sports aesthetics for high-performance street driving.

Cast from XG-150 high carbon alloyed iron and subjected to DBA's proprietary Thermal Stability Profiling (TSP) process, the DBA42165XD is built to withstand the increased stress and heat generated under demanding braking conditions. TSP subjects the iron to prolonged, controlled heat cycles to relieve internal manufacturing stresses, resulting in maximum thermal stability, reduced metal fatigue, and improved fatigue resistance to minimize surface cracking.

Key Features:

• XD Drilled & Dimpled Design: Non-directional cross-drilled holes combined with dimples provide enhanced rotor structural support over traditional cross-drilled configurations, while improving cooling and friction gas evacuation
• Kangaroo Paw Ventilation: 144 diamond and teardrop patterned internal pillars deliver up to 30% more surface area and 20% better cooling efficiency versus traditional straight-vane designs
• Thermal Stability Profiling (TSP): Proprietary heat treatment process increases the rotor's capacity to handle constant and extreme heat over prolonged periods
• Temperature-Sensitive Paint Markings (TGHP): Paint changes color at specific temperature thresholds to help monitor braking temperatures and rotor fatigue
• Symmetrical Design: Chamfered drill holes facilitate the exit of friction dust and gases for a quieter, more responsive brake pedal feel; symmetrical design allows universal left/right fitment
• Rust-Resistant Finish: Non-friction areas are painted to prevent corrosion and enhance appearance
• XG-150 High Carbon Iron Construction: Superior metallurgy handles intense braking applications repeatedly without compromise

Note: Drilled rotor configurations are not recommended for heavy off-road or dedicated track day use. The DBA 4000 Series XD is ideal for performance-oriented street drivers who want a meaningful upgrade in braking capability and thermal management over standard OEM rotors.