ACDelco Professional 18M2418 Brake Master Cylinder Assembly (Rear Drum Brakes)

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Rear Drum Brakes ; 6,400 Lb GVW 

Gold / Professional; Includes Pin & Roller; Includes Reservoir

OEM / Interchange Numbers: 19304686

Warranty Information:
24 Month / Unlimited Mile Warranty

Vehicle Fitment :

Chevrolet : 

  • Silverado 1500 : 2005-2006
  • Silverado 1500 Classic : 2007

GMC :

  • Sierra 1500 : 2005-2006
  • Sierra 1500 Classic : 2007

ACDELCO 18M2418 Specifications

Bleeder Hoses Included : Yes
Bore Size (IN) : 1.125
Brake Booster Included : No
Height (IN) : 6
Length (IN) : 13.62
Master Cylinder Bore Diameter (IN) : 0
Master Cylinder Bore Diameter (MM) : 0
Master Cylinder Cap Included : Yes
Master Cylinder Material : Aluminum
Mounting Bracket Included : No
Mounting Hole Diameter (IN) : 0.433
Primary Outlet Thread Diameter (IN) : 0.5
Primary Outlet Thread Diameter (MM) : 12.7
Push Rod Included : No
Reservoir Included : Yes
Secondary Outlet Thread Diameter (IN) : 0.5
Secondary Outlet Thread Diameter (MM) : 12.7
Weight (lb) : 1.19
Width (IN) : 9.38


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