OEM Style Design: Single reservoir master cylinder built to match original factory-style drum brake system configurations, Vehicle Fitment: Designed for 1955–1964 GM and Chevy applications equipped with original drum brakes, Brake System Type: Intended for drum brake systems only and not compatible with disc brake setups, Port & Bore Specs: Features a 1-inch bore with a 7/16"-24 IFF outlet port for proper brake line connection, Mounting Dimensions: Firewall-mounted unit with 3.390-inch bolt spacing and a 5-7/8-inch overall length for correct installation.
