ACDELCO
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ACDELCO 18B7840  
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ACDELCO 18B7840 Specifications
Abs Tone Ring IncludedNo
Bolt Thread Pitch (MM)22.2
Bolt Thread Pitch (IN)0.874
Depth (IN)4.665
Depth (MM)118.5
Height (IN)6.34
Inside Diameter (IN)13.425
Inside Diameter (MM)341
Length (IN)15.75
MaterialSteel
Nominal Drum Diameter (IN)12.598
Nominal Drum Diameter (MM)320
Outer Cooling FinsNo
Outside Diameter (IN)14.803
Outside Diameter (MM)376
Stud/Lug Hole Diameter (IN)0.874
Stud/Lug Hole Diameter (MM)22.2
Weight (lb)67
Width (IN)15.12
Gold / Professional
ACDelco Professional Brake Drums are constructed with G3000 SAE qualified material for structural integrity and maximum service life. They are tested to ISO/TS 16949 quality system standards and validated for balance to provide great braking performance. Chamfer angle, vane configuration, and plate thickness all follow the OE design, making them the ideal premium aftermarket replacement for your GM or non-GM vehicle.

Features & Benefits:
  • Inspected for balance resulting in smooth brake operation and reduced noise level
  • Follows original manufacturers' designs for dispersing heat, helping to prolong shoe and drumlife while reducing noise and vibration
  • Independently tested with Noise/Vibration/Harshness (NVH) and durability/wear testing; resulting in high quality and reliable products
OEM / Interchange Numbers: 18B87840A, 19328329, 19424847

Warranty Information:
24 Month / Unlimited Mile Warranty
Warranty Details