Finally, someone did it! These are original 1964-1965-1966 Chevrolet horns that have been fully restored to factory specifications. The horns have been unriveted, the diaphragms replaced with new ones, and then reriveted and painted to keep the original look. Notice that the 1961-1966 horns look very similar. The distinguishing feature among the horns is the mounting bracket. Another thing to note is that the casting number for the low horn is interchangeable between 1964, 1965, and 1966, while the high horn number is different. Although the numbers changed for the high horn, the horn and mounting bracket are interchangeable. This is a good thing to not for those who are wanting to get the appropriate horn for your year of Chevrolet. Nonetheless, the best part is that these things will honk! These horns are built when ordered and are drop shipped from our builder. In specific cases we can rush an order, but in most cases please allow additional 10 days for shipment.