67-72 Chevy Truck Master Cylinder & Combination Valve in Aluminum, Disc Drum

Aluminum 1" Bore Master Cylinder, Aluminum Prop Valve Kit For Disc Drum. This application is for Disc Drum applications. Chevy Truck 1"Bore 4 Port Untouched Cast Aluminum Master Cylinder with Aluminum Proportioning Valve Kit for Disc/Drum.