ACDelco 18A2451C Gold Rear Disc Brake Rotor - Solid, Full Cast, Black Hat

The ACDelco 18A2451C is a Gold (Professional) Black Hat Rear Disc Brake Rotor engineered as a high-quality alternative to OE brake components. Part of ACDelco's Gold line — formerly marketed as ACDelco Professional — this solid, full-cast iron rotor is manufactured to meet strict specifications for fit, form, and function.

Key Features:

• ACDelco Gold (Professional) Grade — premium quality designed to meet or exceed OE standards for General Motors vehicles and most other makes and models
• Full Cast Iron Construction — durable one-piece design with turned and ground finish for smooth, consistent braking surface contact
• Rust-Preventative Coating — corrosion-resistant treatment helps extend rotor life and maintain appearance
• Solid (Non-Vented) Design — solid rotor construction appropriate for rear brake applications
• Drum-in-Hat Configuration — integrates parking brake drum function within the rotor hat
• Balanced Construction — independently tested including NVH (Noise, Vibration, and Harshness) and durability/wear testing for smooth, quiet brake operation
• No ABS Tone Ring Included — plain rotor without integrated ABS sensor ring
• OEM Cross-Reference: 19203443

Specifications:

• Outside Diameter: 11.063 in. (281 mm)
• Nominal Thickness: 0.472 in. (12 mm)
• Discard Thickness: 0.413 in. (10.5 mm)
• Overall Height: 2.157 in. (54.8 mm)
• Center Bore Diameter: 2.44 in. (62 mm)
• Bolt Circle Diameter: 4.5 in. (114.3 mm)
• Bolt Hole Quantity: 5
• Pad Contact Surface Width: 1.7 in.
• Material: Cast Iron
• Rotor Style: Plain, Smooth, Non-Slotted
• Position: Rear
• Sold individually (1 per pack)

The ACDelco 18A2451C delivers reliable stopping performance backed by a 1-Year Limited Warranty, making it a trusted choice for professional technicians and DIY mechanics alike.