Proflow Master Cylinder, GM Original Style 67-77, Cast Iron, Natural, 1-1/8 in. Bore, Dual Bowl, Left Port, GM Original Style 67-77

Proflow master cylinders bring a classy look to your GM or street rod. They feature all new components with a wide variety of designs to provide compatibility with manual brakes as well as power-assisted applications. Dual reservoir configurations with several bore diameters accommodate front disc/rear drum brake setups or 4-wheel disc systems. Whether your building a brake system from scratch, or updating a vintage system, Proflow has what you need in a variety of finishes and lid attachment styles.