DBA DBA42793S 4000 Series T3 Slotted Brake Disc Rotor

The DBA DBA42793S is a 4000 Series T3 slotted disc brake rotor engineered for drivers who demand improved braking performance beyond OEM levels. Sold individually, this single-piece, direct-replacement rotor installs with no mechanical modifications required.

At the heart of the 4000 Series T3 is DBA's patented T3 bi-directional slot design, which features 48 precision CNC-machined, tri-symmetrical curved slots per rotor face. Building on the T2 slot pattern, the T3 adds additional gas-scavenging slots to aggressively manage heat, friction dust, and gases generated during hard braking. The symmetrical slot layout eliminates the need for directional rotors, making the DBA42793S a universal fit for both the left and right sides.

Key Features:

• Patented Kangaroo Paw (KP) Pillar Vane Venting — 144 diamond and teardrop-shaped pillars replace conventional straight vanes, delivering up to a 20% improvement in cooling efficiency and up to 30% greater surface area for superior heat dissipation
• XG-150 High Carbon Alloyed Iron — Premium-grade iron with a dense metal matrix and high carbon content for enhanced strength, thermal capacity, and long service life
• Thermal Stability Profiling (TSP) — Proprietary DBA heat treatment process that realigns the microstructure of the iron, stabilizing new castings and improving rotor durability under repeated high-stress braking cycles
• 48 T3 Tri-Symmetrical Curved Slots — Continuously de-glaze brake pads, increase pad bite, reduce brake fade, and provide multiple exit points for friction gases and dust
• Thermo-Graphic Paint Markings — Color-changing paint on the rotor's outer edge monitors core braking temperatures, alerting the driver when rotor temps exceed optimal thresholds
• CBN (Cubic Boron Nitride) Machine-Turned Finish — Minimizes disc thickness variation to reduce the potential for pad knock and premature wear
• Corrosion-Resistant Coating — Non-friction areas are painted to prevent rust and maintain appearance
• QS-9000 Manufacturing Standards — Built to strict quality benchmarks for consistent, reliable stopping power

The DBA 4000 Series T3 is DBA's top-performing single-piece brake rotor, recommended for high-performance street driving, track use, towing, and drifting applications. Each rotor is sold individually — order two for a complete axle set.