ACDelco 18B75B Gold Brake Drum - Cast Iron, Finned, 12 Inch Nominal

The ACDelco 18B75B Gold Brake Drum is a precision-engineered cast iron drum brake component designed as a direct OE-style replacement. Built to ACDelco Gold (Professional) standards, this drum delivers reliable stopping performance with construction quality that meets or exceeds original equipment specifications. OEM reference number: 19171794.

Key Features:

• G3000 SAE-grade cast iron construction for structural integrity and long service life
• Turned brake surface finish — ready to install with no machining required
• Outer finned cooling fins for improved heat dissipation, helping to reduce fade and extend brake shoe life
• Balance-validated for smooth, vibration-free braking performance
• Rust-preventative coating provides corrosion protection for enhanced durability
• Tested to ISO/TS 16949 quality system standards, including NVH (Noise/Vibration/Harshness) and durability evaluation
• OE chamfer angle, vane configuration, and plate thickness for proper fitment
• ABS sensor ring not included
• Sold individually (1 per pack)

Specifications:

• Material: Cast Iron
• Drum Type: Turned
• Nominal Drum Diameter: 304.8mm (12.0 in.)
• Maximum Brake Diameter (Discard): 307.1mm (12.09 in.)
• Outside Diameter: 368.8mm (14.52 in.)
• Inner Brake Drum Height: 63.5mm (2.5 in.)
• Overall Height: 128.27mm (5.05 in.)
• Bolt Circle Diameter: 127mm (5.0 in.)
• Bolt Hole Quantity: 5
• Bolt Hole Diameter: 15.773mm (0.62 in.)
• Center Hole Diameter: 77.8mm (3.06 in.)
• Mount Type: Regular Grade
• Alternate MPN: 18B75, 018B75, 18B75B
• OEM Part Number: 19171794

The ACDelco 18B75B is the updated revision of the 18B75 brake drum, maintaining full form and fit compatibility. It is backed by ACDelco's Gold (Professional) 42-month warranty, making it a trusted choice for brake drum replacement.