The retainers mount the heater box to the firewall. Great addition to any 57 Chevy.
57 Chevy Heater Blower Motor Resistor 1957 Chevrolet New
1957 CHEVY HEATER BOX HARDWARE KIT , NEW
57 Chevy Deluxe Heater Blower Motor Resistor NEW 1957 Chevrolet
57 Chevy Deluxe Heater Control Valve 1957 Chevrolet New
57 Chevy Deluxe Heater Control Cables Stainless Steel 1957 Chevrolet New
57 Chevy Deluxe Aluminum Heater Core 1957 Chevrolet New
