Upgrade your Chevrolet C20 Suburban's braking system with the ACDelco Professional Durastop Brake Master Cylinder. Designed with a 1.25-inch bore diameter and constructed from durable cast iron, this master cylinder is built to provide reliable service. The rust preventative finish ensures longevity and resistance to corrosion. This master cylinder, part number 18M1884, comes with a cap included and is compatible with OEM part numbers 19176494, 18010748, and 18014705. It features 2 ports and is not a vintage or universal fitment part. Manufactured in China, this ACDelco master cylinder is an excellent choice for maintaining the safety and performance of your vehicle's braking system.