DBA DBA42814 Series HD Brake Disc Rotor - 4000 272mm

The DBA DBA42814 is a 4000 Series HD disc brake rotor featuring a smooth OE-style finish engineered for drivers who want meaningful performance gains over factory equipment without the slotted or drilled aesthetic. Sold as a pair with a 272mm rotor diameter, these rotors install as a direct, bolt-on replacement with no mechanical modifications required.

At the core of the 4000 Series HD is DBA's proprietary Thermal Stability Profiling (TSP) — a controlled heat-cycling process applied to XG-150 high carbon alloyed iron that relieves internal manufacturing stresses, maximizes thermal stability, and reduces metal fatigue under extreme braking loads. The result is a rotor that resists warping and maintains consistent performance over its service life.

Internally, the 4000 Series HD uses DBA's patented Kangaroo Paw ventilation, a network of 144 diamond and teardrop-shaped pillars that deliver up to a 30% increase in surface area and a 20% improvement in cooling efficiency compared to traditional straight-vane designs. This advanced venting keeps rotor temperatures lower during sustained or aggressive braking.

Key Features:

• 4000 Series HD variant — smooth OE-style rotor finish, ideal for controlled race divisions or drivers preferring a stock appearance
• 272mm rotor diameter — sold as a pair, positioned on the rear axle
• XG-150 high carbon alloyed iron construction for superior durability and heat resistance
• Thermal Stability Profiling (TSP) — proprietary stress-relief heat treatment for reduced warping and extended service life
• Kangaroo Paw ventilation — 144 diamond and teardrop pillars for up to 20% better heat dissipation
• CBN (Cubic Boron Nitride) machine-turned finish — minimizes disc thickness variation and reduces the risk of pad knock and premature wear
• Thermo-Graphic Heat Paint (TGHP) markings — change color at specific temperature thresholds so you can monitor rotor fatigue and braking temperatures
• Painted non-friction areas to prevent rust and enhance appearance
• Direct bolt-on replacement — no mechanical changes needed

The DBA 4000 Series HD is recommended for performance street driving, heavily laden SUVs and 4WDs, and towing applications where braking demands exceed standard OE expectations. Pair with DBA Street Performance brake pads for optimal compatibility and performance.