ACDELCO
More Information for ACDELCO 18M191
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ACDELCO 18M191  
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ACDELCO 18M191 Specifications
Bleeder Hoses IncludedYes
Bore Size (IN)0.875
Brake Booster IncludedNo
Brake Pressure Switch(s) IncludedYes
Height (IN)5.6
Length (IN)11.3
Master Cylinder Bore Diameter (IN)0.875
Master Cylinder Bore Diameter (MM)22.225
Master Cylinder Cap IncludedYes
Master Cylinder MaterialAluminum
Mounting Bracket IncludedNo
Mounting Hole Diameter (IN)0.423
Primary Outlet Thread Diameter (IN)0.472
Primary Outlet Thread Diameter (MM)12
Push Rod IncludedNo
Reservoir IncludedYes
Secondary Outlet Thread Diameter (IN)0.708
Secondary Outlet Thread Diameter (MM)18
Weight (lb)3.97
Width (IN)7.7
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
OEM / Interchange Numbers: 18030433

Warranty Information:
24 Month / Unlimited Mile Warranty
Warranty Details