ACDelco 18A81021 Professional Front Disc Brake Rotor

The ACDelco 18A81021 is a Gold (Professional) series vented front disc brake rotor engineered as a high-quality alternative to original equipment parts. This premium replacement rotor is designed to deliver reliable braking performance for both General Motors vehicles and most other makes and models.

Precision Engineering for Superior Performance:

• Features thickness variation less than 0.0004 inches to minimize pedal pulsation and brake noise
• Manufactured from OE-matched G3000 qualified cast iron material meeting SAE structural integrity standards
• Vented design with 5-lug bolt pattern (5 x 4.50 inches) for optimized heat dispersion
• 12.30-inch outer diameter provides excellent stopping power
• Inspected for balance to ensure smooth operation and reduced vibration

Ready-to-Install Design:

This rotor requires no machining and comes ready to install straight out of the box. The precision-ground surface finish extends brake pad life while maintaining consistent, fade-free performance. Backed by General Motors engineering expertise, ACDelco Gold rotors undergo an 18-step quality approval process to ensure they meet strict specifications for fit, form, and function.

Note: Some ACDelco Gold parts may have formerly appeared as ACDelco Professional, representing the same trusted quality and performance standards.