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Professional
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
Master Cylinder Signs of Wear:
  • Spongy or mushy braking
  • Brake fluid leaks
  • Slower stop-times
  • Lower than normal brake fluid levels or needing to replace brake fluid more frequently
  • Brakes locking simultaneously
  • Contaminated Brake Fluid (due to leaking seals)
Mounting Hole Quantity2
Port Quantity2
Master Cylinder MaterialCast-Iron
New Or RemanufacturedNew
Brake Booster IncludedNo
Mounting Bracket IncludedNo
Programming RequiredNo
Pushrod IncludedNo
Bleeder Hoses IncludedYes
Master Cylinder Cap IncludedYes
Reservoir IncludedYes
Alternate/OEM Part Number(s): 18030260, 18M18, 19176488

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