ACDelco 18A81032XP Gold Rear Disc Brake Rotor Coated Vented

The ACDelco 18A81032XP is an ACDelco Gold fully coated rear disc brake rotor engineered as a high-quality alternative to Original Equipment (OE) parts. Built from G3000-grade cast iron and featuring a baked-on COOL SHIELD™ eCoat, this vented rotor delivers reliable stopping performance and long-lasting corrosion resistance. The OEM cross-reference for this rotor is GM 19340369.

ACDelco Gold brake rotors are validated through an extensive GM-backed testing regimen to ensure proper fit, form, and function. The precision-ground friction surface features a thickness variation of less than 0.0004" to minimize pedal pulsation, reduce noise, and extend brake pad life. The rotor is mill-balanced and ready to install straight out of the box — no machining required.

Key Features:

• COOL SHIELD™ baked-on coating provides superior rust and corrosion protection, helping prevent rotor seizure to the hub
• Vented disc design dissipates heat effectively during repeated stops and heavy braking
• G3000-grade cast iron construction meets SAE structural integrity standards
• Thickness variation under 0.0004" minimizes brake pedal pulsation and vibration
• Mill-balanced for smooth, quiet brake operation and noise reduction
• No machining required — installs directly from the box
• 6 lug holes for proper hub mounting
• Independently tested with NVH (Noise/Vibration/Harshness) and durability/wear testing
• Backed by General Motors; validated for GM vehicles and most makes and models
• OEM Cross-Reference: GM 19340369

ACDelco Gold disc brake rotors restore smooth, predictable stopping power by providing a clean, flat friction surface for brake calipers and pads to grip. Backed by ACDelco's limited warranty, this rotor is a proven choice for drivers seeking OE-level performance and fit.