The master cylinder offering from Brake Parts Inc (BPI) was developed to give technicians a new part that fits each application as well as the original. The vehicle specific designs match OE and are made from cast iron or aluminum depending on the OE specifications, eliminating stress on the brake booster mounting. Each cylinder comes with new castings, pistons, return springs and components. Everything that technicians needs to get the job done in less time and with fewer comebacks is included. Since the part arrives complete, no assembly is required - just bench bleed and install. Each master cylinder is 100 percent pressure tested to guarantee dependable operation and leak-free performance, and meets SAE J1153 and J1154 requirements for reliability, ensuring safe and confident braking.