Description 1963-1966 13lb Radiator Cap – AC 307-M New reproduction Radiator Cap with 13 lb. pressure rating. This version was used on August 1963 through March 1966 production Corvettes. It was used with the aluminum expansion tank. NOTE: It was not used on air conditioned or 396 engine equipped cars. Has the AC logo marking as well as “Turn Tight”, “Remove Slowly”, and “13# 307”. Fits: 1963, 1964, 1965, 1966 Remember, we ship orders of $40 or more FREE to the lower 48 United States!
