DBA DBA5928.1 Series HD Two-Piece Brake Disc Ring - 5000 324mm

The DBA DBA5928.1 is a 5000 Series HD replacement brake disc ring measuring 324mm × 30mm, engineered as a direct-fit component for the DBA two-piece rotor system. Featuring a smooth, OE-style finish, the HD variant delivers all the structural and thermal advantages of the 5000 Series platform without slotted or cross-drilled surface treatments — ideal for drivers who prefer a clean rotor face with premium performance characteristics.

Key Features:

• High Carbon Cast Iron Ring — XG-150 high carbon iron alloy formulated for superior thermal capacity and optimal pad interaction
• Thermal Stability Profiling (TSP) — Additional heat treatment process realigns the grain structure of the iron at the atomic level, producing a uniform material with increased rotor stability and durability
• Two-Piece Replacement Ring — Sold as a replacement disc ring only; allows reuse of existing DBA 5000 Series aluminium hats for a cost-effective service option
• Kangaroo Paw Vane Design — Unique internal venting profile delivers up to 20% better heat dissipation compared to standard vane designs, reducing brake fade and extending rotor life
• CBN Machine-Turned Finish — Cubic Boron Nitride surface machining minimises disc thickness variation and reduces the risk of pad knock-back and premature wear
• NAS-Spec Hardware Compatible — Designed to be assembled with National Aerospace Standards (NAS) bolts and crimp nuts; tighten to 13 Nm (9.6 ft-lb)
• Thermographic Heat Paint — Temperature-sensitive paint markings permanently change colour at specific heat thresholds, enabling visual monitoring of braking temperatures and rotor fatigue
• HD Smooth Finish — OE-style surface with no slots, dimples, or cross-drilling for a factory appearance with 5000 Series performance

The 5000 Series HD brake ring is recommended for high-performance street vehicles, track day and club racing, and rally applications. When replacing rings only, DBA advises thoroughly inspecting the aluminium hat for wear or damage before reassembly.