DBA DBA42144 4000 Series Plain Faced HD Uni-Directional Disc Brake Rotor

The DBA DBA42144 is a 4000 Series HD plain-faced, uni-directional disc brake rotor engineered for drivers who demand performance braking above and beyond standard OE levels. Disc Brakes Australia (DBA) builds this direct-replacement single-piece rotor for those who want the proven metallurgical advantages of the 4000 Series platform in a clean, smooth OE-style finish.

XG-150 High Carbon Alloyed Iron Construction: Cast from DBA's proprietary XG-150 high carbon alloyed iron, this rotor is formulated specifically to handle the increased stress and heat generated under intense, repeated braking cycles. The high carbon content improves thermal capacity and resistance to surface cracking compared to standard grey iron rotors.

Thermal Stability Profiling (TSP): Every 4000 Series rotor undergoes DBA's exclusive Thermal Stability Profiling process, in which the XG-150 iron is subjected to prolonged, controlled heat cycles to relieve internal manufacturing stresses. The result is maximum thermal stability and reduced metal fatigue — ideal for late-braking, high-demand driving scenarios.

Kangaroo Paw Ventilation Technology: DBA's patented Kangaroo Paw vane design utilizes a series of 144 diamond and teardrop-patterned internal pillars to deliver up to a 30% increase in surface area and up to 20% improvement in cooling efficiency over traditional straight-vane rotor designs, keeping brake temperatures in check during sustained hard braking.

Key Features:

• Plain-faced HD finish — smooth OE-style surface ideal for controlled race divisions or drivers preferring a stock aesthetic
• Cast from XG-150 high carbon alloyed iron for superior heat tolerance and fatigue resistance
• Thermal Stability Profiling (TSP) for reduced internal stress and extended rotor life
• Patented Kangaroo Paw ventilation — up to 30% more surface area and 20% better cooling efficiency vs. straight-vane designs
• Uni-directional rotor design
• Painted non-friction areas to resist rust and enhance appearance
• Heat-sensitive paint markings that change color at specific temperature thresholds for easy rotor temperature and fatigue monitoring
• Direct OE replacement — single-piece construction for straightforward installation

The DBA 4000 Series HD rotor delivers the core performance benefits of DBA's high carbon platform in a smooth, understated finish, making it an excellent upgrade for performance street drivers and competitors in spec racing classes where rotor appearance is regulated.