ACDelco 18B147 Gold Rear Brake Drum - 13.09" Nominal Diameter, 8-Lug

The ACDelco 18B147 is a Gold-series rear brake drum engineered for heavy-duty GM trucks, vans, and SUVs. Constructed from G3000 SAE qualified cast iron, this drum delivers the structural integrity and service life expected of an OE-grade replacement component.

Key Features:

• G3000 SAE qualified cast iron construction for maximum durability and long service life
• Tested to ISO/TS 16949 quality system standards and validated for balance, ensuring smooth, noise-free braking
• OE-matching design — chamfer angle, vane configuration, and plate thickness mirror the original equipment specifications
• Outer cooling fins aid in heat dissipation, helping to prolong brake pad life and reduce noise and vibration
• Turned brake surface finish — no additional machining required; ready to install straight out of the box
• Rust-preventative coating for corrosion protection and superior durability
• Independently tested with Noise/Vibration/Harshness (NVH) and durability/wear testing
• ABS tone ring not included

Technical Specifications:

• Material: Cast Iron
• Position: Rear
• Nominal Drum Diameter: 13.09 in (332.5 mm)
• Maximum Brake Diameter (Discard): 13.0 in (330.2 mm)
• Outside Diameter: 15.48 in (393.2 mm)
• Center Bore Diameter: 4.63 in (117.5 mm)
• Bolt Circle Diameter: 6.5 in (165.1 mm)
• Bolt Hole Quantity: 8
• Bolt Hole Diameter: 0.629 in (15.977 mm)
• Depth: 3.67 in (93.2 mm)
• Outer Cooling Fins: Yes
• Brake Surface Finish: Turned
• ABS Tone Ring Included: No
• Weight: 46.8 lbs

OEM / Cross-Reference Part Numbers:

• OEM / GM Part Number: 19176926
• Wagner Cross-Reference: BD60727
• Alternate MPN: 018B147
• UPC: 707773352199

The ACDelco 18B147 is sold individually and is a premium aftermarket replacement suitable for GM and non-GM vehicles. As an ACDelco Gold-series part, it meets or exceeds original equipment standards for fit, form, and function.