ACDelco Brake Master Cylinder – 18M321

Brake Master Cylinder; ACDelco Professional Brake Master Cylinders use both aluminum and iron castings, making them a high quality replacement for many vehicles on the road today. These master cylinders contain both Ethylene Propylene (EPDM) and Styrene Butadiene (SBR) rubber components to provide superior resistance to heat, corrosion and leakage. ACDelco Professional Brake Master Cylinders are ready to bench bleed and install right out of the box – no assembly required. These premium aftermarket replacement brake master cylinders are manufactured to meet your expectations for fit, form and function.

• Meets the brake performance requirements of SAE J1153 and J1154 testing, providing reliability and quality
• Pressure tested to ensure safe and confident braking
• Cast iron and aluminum specifications; no extra stress on the brake boosting mounting
• Geometrical tolerance ensures that the body and plastic reservoir match for a proper fit
• Piston assembly and return spring help to prevent brake drag, which can cause premature brake pad wear

ACDelco has a tremendous history that encompasses almost 100 years. With new advances in parts technology, new inventions and innovative ideas, ACDelco holds the highest standards in the industry.

For almost 100 years, ACDelco has been sparking the automotive industry and firing customer enthusiasm with automotive products built with a pure passion for the automobile. As you might expect, it began as one man’s hobby. But you may be surprised to discover ACDelco’s integral part in American history with ties to the first self-starting automobile and this country’s first moonwalk.Today ACDelco products are chosen the world over, an accomplishment only the past can explain.