DBA DBA42456 4000 Series HD Front Brake Rotor Smooth OE-Style Finish

The DBA DBA42456 is a front 4000 Series HD disc brake rotor delivering a meaningful upgrade over standard OE braking performance. Featuring a smooth, OE-style rotor finish, the HD variant is the ideal choice for drivers who want the proven engineering of the DBA 4000 Series platform without a slotted or drilled surface — making it popular for controlled race divisions and street applications alike.

Sold individually; two rotors are required per axle. Rotor diameter is 300mm.

Key Features:

• Direct OE Replacement: Single-piece construction designed to bolt on with no mechanical modifications required
• Smooth HD Finish: OE-style rotor face — ideal for stock-appearing builds and controlled race divisions
• High Carbon Alloyed Iron Construction: Cast from premium XG-150 high carbon alloyed iron for superior strength, density, and heat resistance
• Thermal Stability Profiling (TSP): DBA's proprietary heat-cycling process relieves internal manufacturing stresses, maximizing thermal stability and reducing metal fatigue under demanding conditions
• Kangaroo Paw Ventilation: Patented internal vane design using 144 diamond and teardrop patterned pillars, delivering up to 30% more surface area and up to 20% better cooling efficiency versus traditional straight-vane rotors
• Thermo-Graphic Paint Markings: Heat-sensitive paint on non-friction areas changes color at specific temperature thresholds to help monitor rotor temperatures and detect excessive heat exposure
• Rust-Resistant Coating: Painted non-friction areas protect against corrosion and enhance appearance
• Performance Above OE: Engineered to handle the increased stress and heat generated under intense, repeated braking applications

The DBA 4000 Series HD is a premium upgrade brake rotor for drivers seeking enhanced stopping performance, improved heat management, and long-term durability in a clean, factory-style package.