Whether you're building a brake system from scratch, or upgrading from an older outdated worn system. The Aeroflow Performance tandem brake master cylinders install easily, as most mount in the stock location. A tandem master cylinder is just like having two master cylinders combined inside a single housing, sharing a common cylinder bore. This allows the cylinder assembly to control two separate hydraulic circuits. This will be able have separate circuits for both front and rear brakes. We offer a variety of designs to provide compatibility with manual brakes as well as power-assisted applications. Each master cylinder has a GM universal mount spacing (3-3/8") to suit a variety of universal or bolt-on applications. Available in a smooth top in chrome or black finish and in 1" or 1-1/8" bore sizes and constructed from cast aluminium.