Upgrade your vehicle's braking system with the Dorman M4360 Brake Master Cylinder, designed to provide reliable and efficient performance. This master cylinder is crafted from durable cast iron material, ensuring a long-lasting service life. It features a single port for a straightforward installation process and comes with both the master cylinder cap and pushrod for complete kit convenience. With a bore diameter of 1 inch, the Dorman M4360 is a precise fit for the specified applications, including compatibility with OE/OEM part numbers 18008618, 136515H1, and 188891R91. The product is manufactured in Taiwan and boasts a rust preventative finish, maintaining aesthetics and functionality. Note the warning that this product may contain chemicals known to the State of California to cause cancer and reproductive harm.