DBA DBA42096S 4000 Series T3 Slotted Brake Disc Rotor

The DBA DBA42096S is a 4000 Series T3 Slotted Brake Disc Rotor from Disc Brakes Australia — a direct-replacement, single-piece performance upgrade designed for drivers who demand braking performance beyond standard OE levels. Sold individually; order two for a complete axle set.

T3 Bi-Directional Slot Design:

The centerpiece of this rotor is DBA's patented T3 slot technology. Tri-symmetrical curved slots are precision CNC machined into the friction surface, increasing the number of exit points for brake pad friction dust and gases. This reduces out-gassing, minimizes pad glazing, and delivers a quieter, more responsive, and smoother brake pedal feel compared to traditional straight-slot designs. The symmetrical pattern also eliminates the need for separate left and right rotors.

Key Features:

• Patented Kangaroo Paw pillar vane ventilation — 144 diamond and teardrop-patterned internal pillars increase surface area and improve cooling efficiency by up to 20% over straight vane designs
• XG-150 high carbon alloyed iron construction — enhances strength, thermal capacity, and long-term thermal stability
• Thermal Stability Profiling (TSP) — DBA's proprietary heat treatment process realigns the microstructure of the iron, stabilizing new castings and improving rotor durability under intense, repeated braking
• CBN (Cubic Boron Nitride) machine-turned finish — minimizes disc thickness variation, reducing the potential for pad knock and premature wear
• Thermo-Graphic paint markings — change color at specific temperature thresholds to assist with monitoring braking temperatures and rotor fatigue
• Centre split core castings — improve heat transfer and overall thermal efficiency
• Rust-resistant painted non-friction areas — protect rotor surfaces and enhance appearance
• Universal symmetrical slot design — fits left or right position; no directional confusion

Manufactured at DBA's Sydney, Australia facility and built to QS-9000 quality standards, the DBA42096S is engineered for 4x4 and demanding off-road applications where consistent, fade-resistant braking is critical.