DBA DBA42850 4000 Series HD Plain Brake Rotor for BMW M3 E46

The DBA 4000 Series HD is a direct replacement single-piece brake rotor designed for drivers seeking upgraded performance braking above and beyond standard OE levels. The HD variant features a smooth OE-style rotor finish, popular for drivers looking for the benefits of a 4000 Series rotor but requiring an OE-style look, such as controlled race divisions.

Advanced Materials and Construction:

• Cast from high carbon alloyed iron and undergoing Thermal Stability Profiling, DBA's metallurgy can handle the increased stress and heat generated under intense braking applications, time and time again
• Cast from XG-150 high carbon alloyed iron with Thermal Stability Profiling
• Features DBA's patented Kangaroo Paw ventilation that implements a series of 144 diamond and teardrop patterned pillars, achieving up to a 30% increase in surface area and 20% improvement in cooling efficiency compared to traditional straight vane designs

Key Features:

• Plain, non-slotted rotor surface for OE appearance and compliance
• Single-piece direct replacement design
• Thermo-Graphic Heat Paint markings in Green, Orange and Red change color once the rotor reaches predetermined critical temperature thresholds
• Black high-temperature coating on non-friction surfaces for corrosion protection
• Precision machined for smooth, quiet operation

The DBA 4000 Series HD rotor is ideal for enthusiasts who want enhanced thermal performance and durability while maintaining a factory appearance. Suitable for street driving, performance applications, and motorsports where plain rotors are required.