DBA DBA42438 4000 Series HD Brake Disc Rotor with Kangaroo Paw Vane Technology

The DBA DBA42438 4000 Series HD Brake Disc is a direct-replacement, single-piece performance brake rotor engineered for drivers who demand upgraded stopping power above and beyond standard OEM levels. Featuring a smooth OE-style rotor finish, the 4000 Series HD variant delivers the full suite of DBA's advanced engineering while maintaining a clean, understated appearance well-suited to controlled race divisions and performance street applications alike.

Key Features:

• Kangaroo Paw Vane Technology: DBA's patented ventilation system uses 144 diamond and teardrop-shaped pillars to deliver up to a 30% increase in surface area and up to 20% improvement in cooling efficiency over traditional straight vane designs
• Thermal Stability Profiling (TSP): A proprietary DBA heat-treatment process that subjects XG-150 high carbon alloyed iron to controlled, prolonged heat cycles — relieving internal manufacturing stresses and maximizing thermal stability for consistent performance under intense braking
• High Carbon Alloyed Iron Construction: Cast from premium XG-150 grey iron with a high-density metal matrix for long wear, reduced disc thickness variation, and safe, repeatable stopping power
• Thermo-Graphic Paint Markings: Temperature-sensitive paint applied to the non-friction areas changes color at specific thresholds to assist with monitoring braking temperatures and rotor fatigue
• OE-Style Smooth Finish (HD Spec): Smooth rotor face provides the look of a factory rotor while delivering superior internals — ideal for stock-appearance requirements such as controlled race classes
• Rust-Resistant Painted Non-Friction Areas: Hub and non-contact surfaces are coated to prevent corrosion and maintain a clean appearance throughout the rotor's service life
• Direct Bolt-On Fitment: Engineered as a direct OEM replacement — no modifications required for installation

The DBA 4000 Series HD rotor combines DBA's race-proven metallurgy and ventilation engineering in a smooth-faced package. Whether used for spirited street driving or in competition classes requiring OE-style aesthetics, the DBA42438 delivers a measurable upgrade over standard replacement rotors.