Aluminum Combination Proportioning Valve Disc Disc Replacement for Ford, Replacement for Chevy, Classic Cars and Trucks Features: This is for a Aluminum proportioning valve This combination proportioning valve is for Disc/Disc applications This valve performs all the necessary functions when using disc brakes in the front and disc brakes in the rear Styled from the 172-1353(Disc/Drum) and 172-1361(Disc/Disc) valves Package Including: 1 x Performance Aluminum Proportioning Valve