DBA DBA42483XD Series XD Drilled Dimpled Performance Disc Brake Rotor - 4000

The DBA DBA42483XD is a 4000 Series XD performance disc brake rotor from Disc Brakes Australia (DBA), engineered as a direct OE-replacement upgrade for drivers who demand more than factory-level stopping power. The XD designation indicates DBA's signature non-directional cross-drilled and dimpled rotor finish, delivering improved thermal management and an aggressive sports appearance.

Built from XG-150 high carbon alloyed iron and subjected to DBA's proprietary Thermal Stability Profiling (TSP) process, this rotor is heat-treated through controlled cycles to relieve internal manufacturing stresses, realign the iron's microstructure, and maximize thermal stability under extreme braking loads. The result is a rotor that resists metal fatigue and maintains consistent performance during repeated hard stops.

Key Features:

• XD Drilled & Dimpled Surface: Non-directional cross-drilled holes combined with dimples provide additional exit points for brake pad friction dust and gases, while the dimple pattern offers enhanced structural support over traditional cross-drilling alone
• Kangaroo Paw Vane Ventilation: Patented internal vane design featuring 144 diamond and teardrop-shaped pillars delivers up to 30% more surface area and 20% greater cooling efficiency versus conventional straight-vane rotors
• Thermal Stability Profiling (TSP): DBA's proprietary heat treatment process increases the rotor's capacity to handle sustained, intense heat — reducing fade, disc thickness variation, and rotor stress
• Thermo-Graphic Heat Paint (TGHP): Color-coded paint markings on the rotor's outer edge change color at specific temperature thresholds, enabling real-time monitoring of braking temperatures and rotor fatigue
• Symmetrical Design: Chamfered drill holes and symmetrical layout allow universal left/right fitment — no dedicated side-specific part needed
• Corrosion-Resistant Finish: Non-friction areas are painted to prevent rust and enhance visual appearance straight out of the box
• Centre Split Core Casting: Improves heat transfer and overall thermal efficiency during demanding use

Note: Drilled rotor configurations are not recommended for heavy off-road or track day motorsports use. The XD variant is best suited for high-performance street driving applications.

The DBA 4000 Series XD disc rotor installs as a direct bolt-on replacement with no mechanical modifications required, making it a straightforward upgrade over a worn or standard OE rotor.