ACDelco 18A811B Professional Durastop Rear Disc Brake Rotor

The ACDelco 18A811B is a Professional Durastop Rear Disc Brake Rotor engineered as a high-quality alternative to Original Equipment (OE) brake components. Part of the ACDelco Gold (Professional) line and backed by General Motors, this rotor is manufactured to meet strict specifications for fit, form, and function across a wide range of vehicle applications.

Key Features:

• Non-directional ground finish minimizes rotor thickness variation and helps extend brake pad life for consistent, reliable braking
• Application-specific vane configuration maximizes airflow to keep the rotor running cool, while dampening noise and vibration
• Multiple alloy construction provides improved heat dissipation and long-lasting performance under real-world thermal stress
• Mill-balanced design ensures proper rotor function without the need for additional counterweights
• GM-backed quality — manufactured to OE specifications for dependable stopping power
• Compatible with General Motors vehicles as well as most makes and models

The ACDelco 18A811B is a direct-fit replacement rotor designed to restore smooth, quiet deceleration and predictable stopping performance. OEM cross-reference: 18A811, 1AMVR20117. Formerly marketed under the ACDelco Professional and Durastop product lines.