ACDelco 18M920 Professional Brake Master Cylinder Assembly

The ACDelco 18M920 Professional Brake Master Cylinder Assembly features aluminum and iron castings for high-quality replacement performance on a wide range of vehicles. This master cylinder utilizes both Ethylene Propylene (EPDM) and Styrene Butadiene (SBR) rubber components to deliver superior resistance to heat, corrosion, and leakage.

Key Features:

• Ready to bench bleed and install right out of the box with no assembly required
• Meets brake performance requirements of SAE J1153 and J1154 testing standards
• Pressure tested to ensure safe and confident braking performance
• Geometrical tolerance ensures proper fit between body and plastic reservoir
• Piston assembly and return spring help prevent brake drag and premature brake pad wear

This premium aftermarket replacement brake master cylinder is manufactured to meet expectations for fit, form, and function. Part of the ACDelco Professional line, this component offers reliable braking performance and quality construction for vehicles requiring this specific master cylinder configuration.