DBA DBA52321.1XS 5000 Series XS Drilled & Slotted Brake Disc Ring

The DBA DBA52321.1XS is a 5000 Series XS replacement brake disc ring featuring a combined drilled and slotted rotor face design. This ring is sold individually and is engineered as a direct replacement for the outer rotor ring in DBA and other popular two-piece brake rotor configurations, making it an ideal upgrade or service part for high-performance braking systems.

Key Features:

• Two-Piece Composite Design: High carbon cast-iron rotor ring pairs with an aerospace-grade T6061-T6 aluminum hat for reduced unsprung weight and superior thermal management
• XS Drilled & Slotted Surface: Combined cross-drilling and slots improve gas and heat dissipation, reducing brake fade under demanding conditions
• Kangaroo Paw Vane Technology: Asymmetric vane design optimizes airflow through the rotor for enhanced cooling performance
• Thermal Stability Profiling (TSP): Engineered rotor geometry for improved heat handling and consistent braking performance under extreme stress
• Thermo-Graphic Paint Markings: Heat-sensitive paint indicators allow for effective monitoring of rotor operating temperatures
• NAS Hardware: Secured with National Aerospace Standards (NAS) bolts and crimp nuts for a precision, rattle-free fit
• Direct Bolt-On Replacement: No mechanical modifications required — installs directly onto existing two-piece hat assemblies
• Gold Series Finish: Distinctive gold Geomet-style coating resists corrosion and enhances appearance

DBA (Disc Brakes Australia) brings over four decades of brake manufacturing expertise to the 5000 Series. Sold individually as a ring-only replacement, this disc is compatible with existing DBA two-piece hat assemblies. The aluminum hat design allows for uniform radial disc expansion and significantly reduces heat transfer from the disc to the wheel hub — a critical advantage for performance and track driving applications.