DBA DBA4086S 4000 Series T3 Slotted Disc Brake Rotor

The DBA DBA4086S is a 4000 Series T3 slotted performance brake rotor engineered as a direct-fit upgrade over the factory disc. Sold individually, this rotor combines DBA's proven 4000 Series platform with their patented T3 bi-directional slot design, delivering enhanced braking performance for street and demanding off-road use.

T3 Tri-Symmetrical Slot Design:

Building on the T2 slot foundation, the T3 design features additional CNC-machined tri-symmetrical slots, increasing exit points from 32 (T2) to 48 (T3). These curved slots continuously evacuate brake pad friction dust and gases, reduce pad glazing, and deliver a quieter, more responsive pedal feel. The symmetrical slot pattern also makes the rotor fully bidirectional — one rotor fits both left and right sides.

Key Features:

• Patented T3 Bi-Directional Slot Design — 48 CNC-machined tri-symmetrical slots for superior gas and dust evacuation
• Kangaroo Paw Pillar Vane Venting — 144 diamond and teardrop-shaped internal pillars for increased strength and up to 20% better cooling efficiency
• XG-150 High Carbon Alloyed Iron — premium alloy improves thermal capacity, strength, and long-term stability
• Thermal Stability Profiling (TSP) — DBA's proprietary heat treatment process realigns the iron microstructure for increased rotor durability and resistance to warping
• Thermo-Graphic Paint Markings — heat-sensitive markings on the rotor's outer edge change color at specific temperature thresholds to assist with monitoring braking temperatures and rotor fatigue
• CBN Machine-Turned Finish — Cubic Boron Nitride precision machining minimizes disc thickness variation, reducing the potential for pad knock and premature wear
• Painted Non-Friction Areas — corrosion-resistant finish on non-braking surfaces prevents rust and enhances appearance
• QS-9000 Manufacturing Standards — manufactured to quality standards with a dense metal matrix for consistent, long-lasting stopping power
• Direct Bolt-On Replacement — no mechanical modifications required for installation

The DBA 4000 Series T3 is DBA's mid-series enhanced-performance rotor, ideal for drivers seeking a meaningful upgrade over OEM rotors without moving to a full race-spec setup. The combination of TSP heat treatment, advanced vane geometry, and T3 slotting makes this rotor well-suited for both daily driving and high-demand conditions such as off-road, towing, or spirited driving.