DBA DBA42809WXD 4000 Series Wave Cross-Drilled & Dimpled Brake Disc Rotor 310mm

The DBA DBA42809WXD is a 4000 Series Wave XD performance disc brake rotor, combining DBA's signature Wave outer profile with a non-directional cross-drilled and dimpled (XD) surface finish for maximum heat dissipation and striking sports aesthetics. Sold as a pair, these direct-replacement, single-piece rotors are engineered for drivers who demand braking performance well beyond standard OE levels.

Wave Design Technology:

Inspired by the world of motocross and high-end performance vehicles, DBA's Wave design is precision-milled into the outer edge of the rotor. The wavy profile increases surface area for greater heat dispersal, helps maintain optimal pad operating temperatures, and reduces unsprung rotational weight—delivering a noticeable improvement in braking response and feel.

XD Cross-Drilled & Dimpled Finish:

The XD variant goes beyond the standard HD spec by incorporating a non-directional pattern of cross-drilled holes and dimples. This combination provides enhanced rotor structural integrity compared to traditional fully-drilled designs, while effectively evacuating brake dust, gases, and heat from the friction surface. The result is a quieter, more responsive brake pedal and consistent stopping power. Note: drilled rotor configurations are not recommended for heavy off-road or dedicated track day use.

4000 Series Construction:

• XG-150 High Carbon Alloyed Iron – Premium cast iron formulation engineered for optimal thermal performance
• Thermal Stability Profiling (TSP) – Proprietary heat treatment process that aligns the grain structure of the iron at the atomic level, increasing resistance to warping and metal fatigue under extreme braking loads
• Kangaroo Paw Ventilation – 144 diamond and teardrop-shaped internal pillars deliver up to 30% more surface area and a 20% improvement in cooling efficiency versus straight-vane designs
• Thermographic Heat Paint Markings (TGHP) – Color-changing paint indicators on non-friction surfaces allow visual monitoring of peak braking temperatures and rotor fatigue
• Symmetrical cross-drilling – Universal left/right fitment; no separate handed rotors required
• Painted non-friction areas – Factory rust protection on hat and non-contact surfaces for a clean, lasting appearance
• Moisture-proof corrosion protection packaging – Rotors arrive protected and ready to install

Specifications:

• Diameter: 310mm (12.2 in)
• Thickness: 22mm (0.87 in)
• Minimum Thickness: 20mm (0.79 in)
• Height: 48.5mm (1.91 in)
• Centre Hole: 65mm (2.56 in)
• Sold as: Pair (2 rotors)

Recommended for performance street driving, heavily laden SUVs and 4WDs, light utility vehicles, and towing applications.