DBA DBA52774.1 Series HD Two-Piece Brake Disc Ring - 5000

The DBA DBA52774.1 is a 5000 Series HD replacement brake disc ring — the cast iron outer ring component of DBA's premium two-piece composite brake rotor system. Featuring a smooth, OE-style finish, the HD variant delivers all the engineering advantages of the 5000 Series platform without slotted, cross-drilled, or dimpled surface treatments, making it ideal for drivers who want serious performance hardware with a clean, factory-style appearance.

Constructed from high carbon cast iron, this replacement ring is engineered to pair with DBA 5000 Series aluminum hats secured by National Aerospace Standards (NAS) bolts and crimp nuts. The two-piece design allows the cast iron ring to expand radially and uniformly under thermal load, while the aluminum hat minimizes heat transfer from the disc to the wheel hub — protecting bearings and brake fluid from heat soak.

Key Features:

• Smooth HD (heavy duty) OE-style rotor surface — no slots, drilling, or dimples
• High carbon cast iron construction for superior friction performance and durability
• Two-piece composite design reduces unsprung rotational weight
• Compatible with DBA 5000 Series aluminum hats (T6061-T6 aerospace grade)
• NAS (National Aerospace Standards) hardware interface for maximum strength at minimal weight
• Uniform radial disc expansion under heat for consistent braking performance
• Includes DBA's Thermographic Heat Paint (TGHP) for rotor temperature monitoring
• CBN (Cubic Boron Nitride) machine-turned finish minimizes disc thickness variation
• Direct replacement ring — sold individually

This disc ring is a cost-effective replacement option for owners who already have DBA 5000 Series hats in serviceable condition. When replacing only the ring, DBA recommends inspecting the aluminum hat for wear and damage and torquing NAS hardware to 13 Nm (9.6 ft-lb). Recommended for high-performance street driving, track days, club racing, and rally applications.