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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
Mount Hole Diameter (IN)0.531
Outside Diameter (in)11.87
Bolt Circle Diameter (MM)120.7
Mount Hole Diameter (MM)13.487
Center Bore Diameter (IN)2.78
Nominal Drum Diameter (MM)241.3
Maximum Brake Diameter (Discard) (MM)243.59
Discard Thickness (MM)243.6
Outside Diameter (mm)301.5
Bolt Circle Diameter (IN)4.75
Bolt Hole Quantity5
Center Bore Diameter (MM)70.7
Nominal Drum Diameter (IN)9.5
Discard Thickness (IN)9.59
Length (In)9.59
MaterialCast Iron
ABS Sensor Ring IncludedNo
Brake Surface FinishTurned
Outer Cooling FinsYes
Alternate/OEM Part Number(s): 18028393, 19171800

Warranty Information:
24 Month / Unlimited Mile Warranty on parts sold on or after 04/01/18; 12 Months on parts sold before 04/01/18.
Warranty Details