DBA DBA52165.1XD 5000 Series XD Drilled & Slotted Two-Piece Brake Disc Ring

The DBA DBA52165.1XD is a 5000 Series XD replacement brake disc ring — the outer rotor ring component of DBA's premium two-piece composite brake rotor system. Designed as a direct replacement ring for existing DBA 5000 Series two-piece assemblies, this disc ring allows drivers to replace only the worn rotor ring while retaining their existing aluminum hat, making it a cost-effective performance upgrade.

XD Surface Design:

The XD variant features a non-directional cross-drilled and dimpled pattern, combining drilled holes with dimples to deliver enhanced structural support compared to traditional cross-drilled techniques. The XD finish provides improved cooling performance over a smooth HD finish while delivering an aggressive, sporty aesthetic. DBA recommends the XD for high-performance street use rather than dedicated track applications.

5000 Series Key Features:

• High-carbon cast iron construction using XG-150 grey iron for superior strength, wear resistance, and thermal stability
• Thermal Stability Profiling (TSP) — a proprietary DBA heat treatment process that subjects the iron to controlled heat cycles, relieving internal manufacturing stresses for increased rotor stability and long-term durability
• Symmetrical slot and drill pattern for bi-directional fitment — universal left/right use with no dedicated side
• Chamfered drill holes facilitate the exit of brake pad friction dust and gases for a quieter, more responsive pedal feel
• CBN (Cubic Boron Nitride) machine-turned finish minimizes disc thickness variation, reducing the potential for pad knock and premature wear
• Centre split core castings for increased heat transfer and improved thermal efficiency
• Temperature-indicating paint markings change color at specific temperature thresholds to help monitor braking temperatures and rotor fatigue
• Sold as a single disc ring — compatible with existing DBA 5000 Series aluminum hats for economical ring replacement

DBA's 5000 Series is recommended for high-performance street vehicles, track day and club racing, and rally applications. DBA (Disc Brakes Australia) is a globally recognized brake manufacturer with over four decades of engineering experience and product innovation.