ACDelco 18M1492B Gold Brake Master Cylinder Assembly Bore - 0.937

The ACDelco 18M1492B Gold Brake Master Cylinder is a premium-grade replacement brake master cylinder engineered to restore safe, confident braking performance. Built using both aluminum and iron castings, this master cylinder delivers the structural integrity and precision fit required for dependable hydraulic brake operation.

Key Features:

• 0.937" Bore Diameter with aluminum housing and 2 mounting holes for a precise OE-style fit
• Contains both Ethylene Propylene (EPDM) and Styrene Butadiene (SBR) rubber components for superior resistance to heat, corrosion, and fluid leakage
• Meets brake performance requirements of SAE J1153 and J1154 testing standards
• 100% pressure tested to ensure safe and confident braking right out of the box
• Precision geometrical tolerances ensure the body and plastic reservoir mate correctly for a leak-free seal
• Integrated piston assembly and return spring help prevent brake drag and reduce premature brake pad wear
• Ready to bench bleed and install — no additional assembly required
• Reservoir and cap included; bleeder hoses included

The ACDelco Gold line represents high-quality aftermarket replacement parts manufactured to meet expectations for fit, form, and function across a wide range of GM and non-GM vehicle applications. ACDelco Gold parts go through the same rigorous engineering and quality approval process as OE components, backed by a 24-Month/Unlimited Mile Limited Warranty.