When winter comes and it becomes too darn cold for the MGA to reach its normal operating temperature, you might consider fitting this Kingsbury grille muff. These were originally offered through dealers in cold climates, and fit the MGA grille with no drilling whatsoever. You can leave them in place during winter as there are flaps which regulate air flow through the radiator. The image shows the mufflette for the 1500 and 1600. There was also a smaller version to fit the Mk II.