This is a new Black 8" Dual Diaphragm Power Brake Booster and a new Black Ball Milled Flat Top Master Cylinder, along with a Square Flat Firewall Mounting Bracket, Extension Rod, and Clevis for1955 1956 1957 Chevy Tri-5 Vehicles, including the Bel Air, 150, and 210 as well as many other 1955-64 Full Size GM and Chevy Cars.
