DBA DBA42250 4000 Series HD Front Brake Disc Rotor

The DBA DBA42250 is a 4000 Series HD disc brake rotor engineered as a direct-fit, single-piece replacement designed for drivers who demand performance braking above and beyond standard OE levels. Manufactured by Disc Brakes Australia (DBA), this rotor delivers a meaningful upgrade over factory brake components without sacrificing daily driveability.

The 4000 Series HD variant features a smooth OE-style rotor finish, making it an ideal choice for drivers who want the full performance benefits of the 4000 Series platform while retaining a factory-style appearance — including applications in controlled race divisions where a stock-look rotor is required.

Key Features:

• High Carbon Alloyed Iron Construction: Cast from XG-150 high carbon alloyed iron for superior heat resistance, reduced vibration, and quieter operation compared to standard grey iron rotors
• Thermal Stability Profiling (TSP): DBA's proprietary process subjects the rotor to controlled heat cycles to relieve internal manufacturing stresses, maximizing thermal stability and fatigue resistance under extreme braking demands
• Kangaroo Paw Ventilation: Features 144 diamond and teardrop-patterned pillars between the rotor faces, delivering up to 30% more surface area and 20% better cooling efficiency versus a traditional straight-vane design
• CBN Machine-Turned Finish: Cubic Boron Nitride precision machining minimizes disc thickness variation, reducing the risk of pad knock and premature wear
• Thermographic Heat Paint: Color-coded paint markings on non-friction areas change color at specific temperature thresholds, allowing drivers to monitor rotor temperatures and braking fatigue over time
• Rust-Resistant Coating: Non-friction surfaces are painted to inhibit corrosion and maintain appearance
• OE-Style Smooth Finish: Clean, unslotted surface for stock-appearance applications and everyday street use

The DBA 4000 Series HD brake rotor is sold individually and is engineered to bolt on in place of the original equipment rotor with no modifications required. For drivers seeking a performance upgrade with an OE look, the DBA42250 delivers enhanced thermal management, greater durability, and consistent stopping power stop after stop.