Replace and upgrade that old rusty, industrial looking O.E.M. master cylinder with a JEGS aluminum master cylinder. Our dual reservoir cylinder is machined from cast, aircraft quality, aluminum into a smooth and stylish unit. We then fully polish each one and finish it with high luster chrome to provide the finishing touch to any engine compartment. Features a billet top cover and GM universal mounting with one 9/16" & one 1/2" port on each side.