Universal thermostat o-rings and gasket kit to suit Aeroflow Performance thermostats AF49-1043 and AF49-1044. Must be used in conjuction with AF49-1043 and AF49-1044 Thermostats. Can be used in a variety of vehicles models such as Chevy, Ford Windsor, Ford Cleveland, Holden, Ford XR6, Nissan FJ20 and Chrysler 6 cylinder.