ACDelco 18M391431 Professional Brake Master Cylinder Assembly

The ACDelco 18M391431 Professional Brake Master Cylinder Assembly is a premium aftermarket replacement component engineered to restore reliable braking performance to your vehicle. This complete assembly features durable aluminum and iron castings that provide exceptional strength without placing extra stress on the brake booster mounting system.

Superior Materials and Engineering:

• Constructed with both Ethylene Propylene (EPDM) and Styrene Butadiene (SBR) rubber components for superior resistance to heat, corrosion, and leakage
• Aluminum and iron casting construction ensures long-lasting durability and proper fit
• Piston assembly and return spring design helps prevent brake drag and premature pad wear
• Precision geometrical tolerances ensure proper fit between body and reservoir

Quality and Performance:

• Meets SAE J1153 and J1154 brake performance testing requirements
• Pressure tested for safe and confident braking operation
• Ready to bench bleed and install right out of the box with no assembly required
• Manufactured to meet expectations for fit, form, and function

This ACDelco Professional brake master cylinder assembly delivers the quality and reliability you need for critical brake system repairs.