ACDelco 18A2451 Gold Solid Rear Disc Brake Rotor

The ACDelco 18A2451 is an ACDelco Gold (Professional) solid rear disc brake rotor engineered as a high-quality aftermarket replacement for a wide range of vehicles. Manufactured from G3000-grade cast iron and backed by General Motors, this rotor delivers reliable stopping power and long-lasting durability you can count on.

Built to meet or exceed OE specifications, the 18A2451 features a thickness variation of less than 0.0004 inches to minimize pedal pulsation and brake noise while helping to extend brake pad life. The rotor meets SAE standards for structural integrity and is precision-finished with a turned and ground surface for consistent pad contact.

Key Features:

• Solid rotor construction — full cast iron, drum-in-hat design for rear axle applications
• G3000-qualified material — meets SAE structural integrity standards for guaranteed performance
• Precision thickness tolerance — less than 0.0004" variation to reduce pedal pulsation and noise
• 5-lug bolt pattern — 114.3mm bolt circle diameter (4.5 in.), compatible with common import platforms
• 11.063" outside diameter — 0.472" nominal thickness, 0.413" discard thickness
• Smooth, plain surface finish — no slotting or drilling; street-ready right out of the box
• No machining required — installs directly without additional preparation
• Sold individually — 1 rotor per package

The ACDelco Gold line is designed, engineered, and tested to the same rigorous 18-step quality approval process as GM OE parts, making the 18A2451 an ideal choice for a confident, straightforward brake service.