DBA DBA4200S 4000 Series T3 Slotted Disc Brake Rotor

The DBA DBA4200S is a 4000 Series T3 slotted disc brake rotor from Disc Brakes Australia (DBA), engineered as a direct-replacement, single-piece performance upgrade over standard OE rotors. Designed for drivers who demand improved stopping power for both street and high-performance applications, it delivers consistent, fade-resistant braking with every stop.

T3 Tri-Symmetrical Slot Design:

• Features DBA's patented T3 bi-directional slot design with 48 precision CNC-machined tri-symmetrical curved slots
• Increases exit points for brake pad friction dust and gases, improving pedal feel and reducing fade
• Symmetrical slot pattern allows universal left/right fitment — no directional rotor to worry about
• Slots continuously de-glaze brake pad surfaces, improving bite and extending pad life

Premium Materials & Manufacturing:

• Cast from XG-150 high carbon alloyed iron for superior strength, thermal capacity, and stability
• Undergoes DBA's proprietary Thermal Stability Profiling (TSP) heat treatment process to relieve internal stresses and maximize durability under extreme braking
• Manufactured to QS-9000 quality standards for consistent, long-lasting performance
• CBN (Cubic Boron Nitride) machine-turned finish minimizes disc thickness variation and reduces the risk of pad knock and premature wear

Kangaroo Paw Ventilation:

• DBA's patented Kangaroo Paw pillar vane venting uses 144 diamond and teardrop-shaped pillars instead of conventional straight vanes
• Provides up to a 30% increase in surface area and up to a 20% improvement in cooling efficiency compared to traditional vented rotor designs
• Centre-split core castings further enhance heat transfer and thermal efficiency

Additional Features:

• Thermo-Graphic heat paint markings on the rotor's outer edge change color at specific temperature thresholds, helping monitor braking temperatures and rotor fatigue
• Non-friction areas are painted to prevent rust and enhance appearance
• Sold individually

The DBA DBA4200S is a proven performance upgrade, offering enhanced stopping consistency, reduced brake fade, and improved rotor longevity over standard OE discs — whether on the daily commute or at the track.