ACDelco 18A2422 Professional Black Hat Rear Disc Brake Rotor

The ACDelco 18A2422 is a professional-grade rear disc brake rotor designed as a high-quality alternative to original equipment parts. This black hat style rotor is engineered to deliver reliable braking performance for General Motors vehicles and most other makes and models.

Key Features:

• Full cast iron construction with G3000 qualified material for structural integrity
• Precision thickness variation less than 0.0004 inches to minimize pedal pulsation and noise
• Mill-balanced for smooth operation and noise reduction
• 11.060-inch (281mm) outside diameter with 5 bolt holes
• Minimum discard thickness of 0.335 inches (8.5mm)
• Ready to install - no machining required
• Independently tested for noise, vibration, and harshness (NVH) performance

This rotor follows original manufacturer designs for optimal heat dispersion, helping to prolong both pad and rotor life while reducing noise and vibration. ACDelco Gold (formerly Professional) rotors are manufactured to meet GM's expectations for fit, form, and function, and are backed by General Motors quality standards.