DBA DBA52448.1S Series Slotted Brake Disc Ring Two-Piece Replacement - 5000 T3

The DBA DBA52448.1S is a 5000 Series T3 slotted replacement brake disc ring, purpose-built for high-performance street driving, track days, club racing, and rally applications. As a replacement ring for two-piece composite rotor assemblies, it allows drivers to replace only the worn cast iron friction ring rather than the entire rotor assembly, delivering a more economical long-term maintenance solution.

Two-Piece Composite Construction:

The 5000 Series two-piece design pairs a high carbon cast iron disc ring with an aerospace-grade T6061-T6 aluminum hat, secured by National Aerospace Standards (NAS) bolts and crimp nuts rated to withstand operating temperatures up to 650°C. The aluminum hat reduces unsprung weight while allowing for uniform radial disc expansion and minimizing heat transfer from the disc to the hub.

Key Features:

• T3 Tri-Symmetrical Slotting – Trisymmetrical slot pattern continuously cleans the pad friction face, evacuates debris and gases, dampens harmonics, and improves pedal feel and responsiveness
• Thermal Stability Profiling (TSP) – DBA's proprietary process subjects XG-150 grey iron to controlled heat cycles during manufacturing to relieve internal stresses, maximize thermal stability, and reduce metal fatigue under extreme braking conditions
• High Carbon Alloy Iron – Formulated for optimal interaction with DBA's thermal stability process, increasing the rotor's capacity to handle sustained and extreme heat
• CBN Machine-Turned Finish – Cubic Boron Nitride surface finishing minimizes disc thickness variation, reducing the potential for pad knock and premature wear
• Thermo-Graphic Heat Paint (TGHP) – Color-changing paint markings indicate specific temperature thresholds, helping monitor braking temperatures and rotor fatigue
• Premium Corrosion-Resistant Coating – Applied to all non-friction areas for protection during storage and service life
• NAS Hardware – Lightweight, high-tensile A286 corrosion-resistant alloy bolts and crimp nuts meet National Aerospace Standards; DBA recommends 13 Nm (9.6 ft-lb) torque when assembling

This disc ring is sold as an individual replacement component, compatible with existing DBA 5000 Series aluminum hats for a cost-effective ring-only replacement. Whether upgrading from a standard one-piece rotor or replacing a worn ring in an existing two-piece setup, the DBA 5000 Series T3 slotted ring delivers proven performance technology in a direct OE-replacement format.