DBA DBA52321BLKXD Series XD Drilled Dimpled Brake Rotor Black Hat - 5000 2-Piece

The DBA 5000 Series XD is a premium two-piece composite brake rotor engineered for high-performance street driving, track days, club racing, and rally applications. Built on the same performance foundation as the acclaimed 4000 Series, the 5000 Series XD elevates braking capability with a lightweight two-piece construction and a non-directional cross-drilled and dimpled (XD) rotor face finish in an aggressive black hat.

The XD surface pattern combines drilled holes with strategically placed dimples to deliver enhanced cooling above the standard HD finish while providing superior structural support over traditional fully cross-drilled designs. This unique mix of dimples and drilled holes increases exit points for brake pad friction dust and gases, resulting in consistent, fade-resistant braking and a sporty aesthetic.

Key Features:

• Two-Piece Composite Construction: High-carbon XG-150 cast iron rotor ring paired with an aerospace-grade T6061-T6 aluminum hat, secured by National Aerospace Standards (NAS) bolts and crimp nuts
• XD Non-Directional Finish: Mixed cross-drilled holes and dimples for superior cooling, improved gas and debris evacuation, and enhanced structural integrity versus standard drilled rotors
• Kangaroo Paw Ventilation: DBA's patented 144-pillar diamond and teardrop vane pattern improves cooling efficiency by up to 20% over conventional straight-vane rotors
• Thermal Stability Profiling (TSP): Proprietary heat-cycling process relieves internal stresses from manufacturing, maximizing thermal stability and reducing metal fatigue under heavy use
• Thermo-Graphic Heat Paint (TGHP): Nine color-coded paint markings change color at specific temperature thresholds to help monitor rotor heat and guide brake pad selection
• Reduced Unsprung Weight: Aluminum hat construction lowers unsprung mass for improved vehicle dynamics and allows uniform radial disc expansion through the cast iron ring
• Reduced Heat Transfer: Two-piece design limits heat transfer from disc to hub, protecting wheel bearings and suspension components
• Black Hat Finish: Sleek black anodized aluminum hat for a premium appearance behind the wheel
• Replaceable Rings: Cast iron rotor rings can be replaced independently of the aluminum hat, offering a cost-effective maintenance solution

Recommended torque for the NAS nut and bolt assembly is 13 Nm (9.6 ft-lb). Ideal for high-performance street vehicles, track day and club racing, and rally applications where superior heat management and braking consistency are required.