| ACDELCO 18B87 Specifications |
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| Abs Tone Ring Included | No | | Bolt Circle Diameter (IN) | 3.94 | | Bolt Circle Diameter (MM) | 100 | | Brake Surface Finish | Turned | | Center Bore Diameter (IN) | 2.26in | | Center Bore Diameter (MM) | 57.4mm | | Depth (IN) | 1.88 | | Depth (MM) | 47.75 | | Discard Thickness (IN) | 8.71 | | Discard Thickness (MM) | 221.2 | | Height (IN) | 3.3 | | Length (IN) | 8.71 | | Material | Cast Iron | | Maximum Brake Diameter (Discard) (MM) | 221.23 | | Mount Hole Diameter (IN) | 0.566in | | Mount Hole Diameter (MM) | 14.376mm | | Nominal Drum Diameter (IN) | 0.343 | | Nominal Drum Diameter (MM) | 8.7 | | Outer Cooling Fins | No | | Outside Diameter (IN) | 0.389 | | Outside Diameter (MM) | 9.9 | | Stud/Lug Hole Diameter (IN) | 0.558 | | Stud/Lug Hole Diameter (MM) | 14.15 | | Weight (lb) | 9.75 | | Width (IN) | 11.1 |
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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
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| OEM / Interchange Numbers: 18028400 |
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