DBA DBA4429XS Series Cross-Drilled Slotted Disc Brake Rotor - 4000

The DBA DBA4429XS 4000 Series is a premium performance disc brake rotor engineered for drivers who demand braking capability well beyond standard OE levels. Cast from XG-150 high carbon alloyed iron and treated with DBA's proprietary Thermal Stability Profiling (TSP) process, this rotor is built to handle the intense stress and heat generated under demanding braking conditions, repeatedly and reliably.

The 4000XS pattern combines cross-drilling and symmetrical slotting in a unique non-directional layout, increasing the number of out-gassing exit points so that friction dust and brake pad gases can escape freely. The result is a quieter, more responsive pedal feel and consistent braking performance stop after stop. Symmetrical slotting and drilling also allow for universal left/right fitment.

At the core of the 4000 Series is DBA's patented Kangaroo Paw ventilation system, which features 144 diamond and teardrop patterned pillars delivering up to a 30% increase in surface area and a 20% improvement in cooling efficiency compared to traditional straight-vane designs. This dramatically reduces brake fade and extends the service life of both pads and rotors.

Key Features:

• XG-150 High Carbon Alloyed Iron construction for superior strength and heat resistance
• Thermal Stability Profiling (TSP) aligns grain structure at the atomic level for a uniform, warp-resistant rotor
• Patented Kangaroo Paw ventilation — up to 30% more surface area and 20% better cooling vs. straight-vane designs
• Cross-drilled and slotted XS pattern vents friction gases and expels water and debris for consistent bite
• Symmetrical design for universal left/right installation — no need to order side-specific rotors
• CBN (Cubic Boron Nitride) machine-turned finish minimizes disc thickness variation and reduces the risk of pad knock and premature wear
• Thermographic Heat Paint Markings change color at specific temperature thresholds, allowing monitoring of peak braking temperatures and rotor fatigue
• Gold-painted non-friction surfaces resist rust and provide a premium appearance behind open-spoke wheels
• Sold individually — order two for a complete axle set

The DBA 4000 Series XS rotor is ideally suited for performance street cars, heavily loaded trucks and 4WDs, and towing applications. Backed by DBA's reputation as a multi-award-winning Australian manufacturer with over four decades of brake engineering expertise, the DBA4429XS delivers a direct-fit, bolt-on upgrade over factory rotors.