For 1955-1959 GMC S370 Thermostat Housing Gasket Gates 74845RRYY 1956 1957 1958

1958 GMC S370 5.5L V8 GAS. 1956-1959 GMC S370 4.4L 6 Cyl GAS. 1955-1956 GMC S370 5.2L V8 GAS. 1955 GMC S370 4.7L V8 GAS. Notes: Thermostat Gasket. Self-adhesive backing holds thermostat in place while water outlet is being installed.