ACDelco 18A399C Gold Black Hat Front Disc Brake Rotor and Hub Assembly

The ACDelco 18A399C is a Gold (formerly Professional) Black Hat Front Disc Brake Rotor and Hub Assembly, engineered as a high-quality replacement for Original Equipment (OE) parts on select General Motors vehicles. This vented, full-cast iron rotor and hub unit delivers reliable stopping power while meeting or exceeding OEM specifications for fit, form, and function.

Key Features:

• Integrated Hub Assembly: Rotor and hub are combined into a single unit for straightforward installation with no separate hub required
• ABS Sensor Ring Included: Equipped with an integrated ABS tone ring for compatibility with anti-lock braking systems
• Vented Full-Cast Iron Construction: Application-specific vane configuration maximizes airflow, dissipates heat effectively, and dampens noise and vibration
• Non-Directional Ground Finish: Minimizes thickness variation to reduce pedal pulsation and extend brake pad life
• Rust-Preventative Black Hat Coating: Provides corrosion protection on the hat surface for superior long-term durability
• Mill-Balanced: Precision-balanced during manufacturing for smooth, vibration-free brake operation right out of the box
• OEM-Matched G3000 Material: Meets SAE structural integrity standards; no additional machining required
• 5-Lug, 5x127mm Bolt Pattern: Outside diameter of approximately 11.86 in (301.2 mm)

The ACDelco 18A399C is independently tested — including D3EA, Noise/Vibration/Harshness (NVH), and durability/wear testing — to ensure consistent, high-quality performance. It is backed by General Motors and is the trusted choice for restoring safe, quiet braking to your vehicle.