DBA DBA4546S 4000 Series T3 Slotted Rear Disc Brake Rotor

The DBA DBA4546S is a 4000 Series T3 bi-directional slotted disc brake rotor from Disc Brakes Australia (DBA), engineered as a direct-fit, single-piece performance upgrade over standard OEM braking. Designed for drivers who demand more from their brake system, this rear rotor delivers a notably quieter, more responsive, and smoother pedal feel compared to stock rotors.

T3 Tri-Symmetrical Slot Design:

Building on DBA's proven T2 slot foundation, the T3 design features precise CNC-machined tri-symmetrical slots that increase the number of exit points for brake pad friction dust and gases. Going from 32 slots (T2) to 48 slots (T3), the result is enhanced pad bite, reduced glazing, and consistent braking performance stop after stop. The bi-directional slot pattern eliminates the need for separate left- and right-specific rotors, making installation straightforward.

Key Features:

• XG-150 High Carbon Alloyed Iron construction for superior strength, thermal capacity, and extended service life
• Thermal Stability Profiling (TSP) — DBA's proprietary heat-treatment process relieves internal casting stresses, maximizing thermal stability and reducing metal fatigue under intense braking
• Kangaroo Paw ventilation system — 144 diamond and teardrop-shaped pillars deliver up to 30% more surface area and 20% improved cooling efficiency versus conventional straight-vane designs
• CNC-machined T3 tri-symmetrical slots — 48 slots for maximum friction dust and gas evacuation, quieter operation, and consistent pad contact
• Thermographic heat paint markings — color-change indicators at specific temperature thresholds allow easy monitoring of braking temperatures and rotor fatigue
• CBN (Cubic Boron Nitride) machine-turned finish — minimizes disc thickness variation, reducing the potential for pad knock and premature wear
• Paint-protected non-friction areas — corrosion-resistant coating on all non-contact surfaces for lasting appearance
• Direct OEM replacement fit — bolts on without mechanical modifications
• Sold individually

Manufactured to QS-9000 quality standards, the DBA 4000 Series T3 rotor is the ideal choice for performance street driving and high-demand applications where heat management and consistent stopping power are critical.