DBA DBA42705S 4000 Series T3 Slotted Performance Brake Rotor

The DBA 4000 Series T3 (DBA42705S) is a direct-fit, single-piece performance brake rotor engineered for drivers who demand more than standard OE braking. Cast from XG-150 high carbon alloyed iron and treated with DBA's proprietary Thermal Stability Profiling (TSP) process, this rotor is built to withstand the increased stress and heat generated under extreme road and track braking applications.

T3 Bi-Directional Slot Design:

The T3 slot pattern builds on DBA's proven T2 foundation, adding precise, CNC-machined tri-symmetrical slots that create additional exit points for brake pad friction dust and gases. The result is a quieter, more responsive, and more consistent pedal feel stop after stop. The symmetrical slotting also facilitates universal left/right fitment.

Key Features:

• Patented Kangaroo Paw Ventilation — 144 diamond and teardrop patterned pillars deliver up to a 30% increase in surface area and 20% improvement in cooling efficiency versus traditional straight-vane designs
• XG-150 High Carbon Alloyed Iron Construction — Superior heat management and structural integrity under repeated hard stops
• Thermal Stability Profiling (TSP) — Proprietary heat treatment process relieves internal manufacturing stresses, maximizing rotor stability and reducing metal fatigue in high-demand applications
• CNC-Machined T3 Tri-Symmetrical Slots — 48 precision-cut slots purge friction dust and gases for consistent, fade-resistant braking
• Thermo-Graphic Paint Markings — Color-changing indicators on the rotor edge allow monitoring of braking temperatures and rotor fatigue over time
• Rust-Resistant Coating — Non-friction areas are painted to prevent corrosion and enhance appearance
• Direct OE Replacement — Bolt-on fitment with no mechanical modifications required
• Recommended for High-Performance Applications — Suited for aggressive street driving, road course use, and motorsport events

The DBA42705S is denoted by the (S) suffix in the 4000 Series lineup, identifying it as a T3 slotted variant. Whether pushing hard on a road course or navigating daily performance driving, the 4000 Series T3 rotor delivers upgraded stopping power with long-term durability.