DBA DBA42809XD Series XD Cross-Drilled Dimpled Brake Rotor - 4000

The DBA DBA42809XD is a 4000 Series XD performance brake rotor from Disc Brakes Australia (DBA), featuring a non-directional cross-drilled and dimpled finish for enhanced braking performance and cooling. Designed as a direct-fit, single-piece replacement rotor, this disc brake rotor delivers upgraded stopping power above and beyond standard OE levels.

The XD finish combines cross-drilled holes with DBA's signature dimple pattern, offering additional cooling benefits over the standard 4000 Series HD spec while also enhancing the rotor's sporty visual appearance. The combination of drilled holes and dimples provides superior rotor structural support compared to traditional fully cross-drilled techniques.

Key Features:

• 4000 Series XD Design: Non-directional cross-drilled and dimpled rotor surface for improved heat dissipation and brake pad gas/dust evacuation
• Kangaroo Paw Ventilation: 144 diamond and teardrop-patterned internal pillars deliver up to 30% more surface area and 20% improved cooling efficiency versus conventional straight-vane designs
• High Carbon Alloyed Iron Construction: Cast from premium high-carbon alloyed iron capable of handling intense, repeated braking stress and extreme heat
• Thermal Stability Profiling (TSP): DBA's proprietary heat treatment process relieves internal manufacturing stresses, maximizing thermal stability and reducing metal fatigue under demanding conditions
• Thermographic Heat Paint Markings: Color-coded paint indicators change at specific temperature thresholds to help monitor rotor temperatures and assess rotor fatigue
• Symmetrical Drilling Pattern: Universal left/right fitment for straightforward installation
• CBN Machine Turned Finish: Cubic Boron Nitride machining minimizes disc thickness variation, reducing the potential for pad knock and premature wear
• Corrosion Protection: Non-friction areas are painted to prevent rust and improve appearance

Note: Cross-drilled rotor configurations are not recommended for heavy off-road or dedicated track day use. For track applications, DBA's slotted (T3) series is recommended.

The DBA 4000 Series XD is an ideal upgrade for performance-oriented street drivers seeking improved braking response, better thermal management, and an aggressive rotor aesthetic over a standard OE or HD replacement disc.