ACDelco 18M996B Professional Brake Master Cylinder Assembly

The ACDelco 18M996B is a Professional-grade brake master cylinder assembly engineered as a high-quality replacement for OE braking system components. Built with both cast iron and aluminum construction, this master cylinder delivers the durability and precision needed for reliable, confident braking performance.

Key Features:

• Meets brake performance requirements of SAE J1153 and J1154 testing standards for reliability and quality
• Pressure tested to ensure safe and confident braking
• Cast iron and aluminum specifications place no extra stress on the brake booster mounting
• Geometric tolerances ensure the body and plastic reservoir match for a proper, leak-free fit
• Contains both Ethylene Propylene (EPDM) and Styrene Butadiene (SBR) rubber components for superior resistance to heat, corrosion, and leakage
• Piston assembly and return spring help prevent brake drag, reducing premature brake pad wear
• Ready to bench bleed and install straight out of the box — no assembly required
• Bleeder hoses included

The ACDelco 18M996B is backed by a 12-month / unlimited-mile warranty, reflecting ACDelco's commitment to quality and long-term performance. This is a premium aftermarket replacement part manufactured to meet expectations for fit, form, and function.