DBA DBA42705 Series HD Disc Brake Rotor - 4000

The DBA DBA42705 is a 4000 Series HD disc brake rotor from Disc Brakes Australia (DBA), delivering upgraded braking performance above standard OE levels. The HD variant features a smooth OE-style rotor finish, making it ideal for drivers who want the full 4000 Series performance advantage while maintaining a factory-style appearance — including for use in controlled race divisions that require OE-style rotor aesthetics.

Cast from XG-150 high carbon alloyed iron and treated with DBA's proprietary Thermal Stability Profiling (TSP) process, this rotor is engineered to handle the increased stress and heat generated during intense braking applications. Under TSP, the iron is subjected to prolonged heat cycles under strictly controlled conditions, relieving internal manufacturing stresses to ensure maximum thermal stability and reduced metal fatigue.

Key Features:

• Kangaroo Paw ventilation — DBA's patented system using 144 diamond and teardrop-patterned pillars for up to 30% more surface area and 20% improved cooling efficiency versus traditional straight vane designs
• XG-150 high carbon alloyed iron construction for superior heat resistance and long service life
• Thermal Stability Profiling (TSP) — proprietary heat treatment process for maximum rotor stability and reduced metal fatigue
• Thermo-Graphic Heat Paint (TGHP) markings that change color at specific temperature thresholds to monitor rotor temperatures and braking fatigue
• Smooth OE-style finish — HD spec with no slots or drilling, suitable for controlled race divisions
• Painted non-friction areas to prevent rust and enhance appearance
• Direct OE replacement — single-piece design that bolts on with no modifications required
• Moisture-proof corrosion protection packaging

The DBA 4000 Series HD rotor is a direct-fit, single-piece performance upgrade that installs in place of the factory rotor without modification. It is backed by DBA's engineering heritage as a leading Australian brake manufacturer with over 30 years of experience supplying both aftermarket and OEM brake components worldwide.