Wilwood Disc Brakes 260-3376 Master Cylinder, Aluminum, Natural, .875 in. Bore, Universal, Kit - Wilwood compact remote-mount brake master cylinder kits are precision-machined from high-strength aluminum. They include both small and large size reservoirs that can be mounted directly onto the master cylinder, or remotely mounted for more convenient service access. A variety of bore sizes and configurations are available, and a standard mounting flange provides easy installation in any vehicle.