| ACDELCO 18M991 Specifications |
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| Bleeder Hoses Included | Yes | | Bore Size (IN) | 1.000 | | Brake Booster Included | No | | Height (IN) | 4.8 | | Length (IN) | 9.4 | | Master Cylinder Bore Diameter (IN) | 1 | | Master Cylinder Bore Diameter (MM) | 25.4 | | Master Cylinder Cap Included | Yes | | Master Cylinder Material | Iron | | Mounting Bracket Included | No | | Mounting Hole Diameter (IN) | 0.406 | | Primary Outlet Thread Diameter (IN) | 0.437 | | Primary Outlet Thread Diameter (MM) | 11.112 | | Push Rod Included | No | | Reservoir Included | Yes | | Weight (lb) | 4.37 | | Width (IN) | 5.8 |
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| Gold / Professional; Includes Reservoir |
ACDelco Professional Brake Master Cylinders use both aluminum and iron castings, making them the high quality replacements.
Features & Benefits:
- Contain both Ethylene Propylene (EPDM) and Styrene Butadiene (SBR) rubber components to provide superior resistance to heat, corrosion, and leakage
- Ready to bench bleed and install right out of the box - no assembly required
- Manufactured to meet OE specifications of fit, form, and function
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| OEM / Interchange Numbers: 19106777 |
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