ACDelco 18A82031B Professional Disc Brake Rotor

The ACDelco 18A82031B is a Professional-grade disc brake rotor engineered to deliver reliable, consistent stopping power. Built to meet or exceed OE specifications, this rotor is a direct-fit replacement backed by General Motors and designed to restore confident braking performance.

Key Features:

• G3000 Qualified Material: Meets SAE standards for structural integrity with OE-matched gray iron casting for guaranteed performance and durability
• Tight Thickness Variation: Thickness variation of less than 0.0004 inches minimizes brake pedal pulsation, reduces noise, and helps extend brake pad life
• Mill-Balanced Design: Precision mill-balanced for proper rotor function — no additional weights required
• Multiple Alloys for Heat Dissipation: Manufactured with multiple alloys to improve heat dissipation and sustain braking performance under real-world thermal stress
• Rounded Radius Construction: Features a rounded radius design for added structural strength
• No Machining Required: Ready to install straight out of the box with no additional preparation needed
• Quality Validated: Validated for proper metallurgy and correct brake plate thickness to ensure reliable, safe operation

The ACDelco 18A82031B is part of ACDelco's Professional (Gold) line — a high-quality alternative to Original Equipment parts, manufactured to meet exact expectations for fit, form, and function across a wide range of vehicle applications.