Shop › Frame Clamp for Manual Push Horn Frame Clamp for Manual Push Horn $55.00 U.S. made reproduction used to clamp a Klaxon-3, Stewart Warner, or other push horn to a frame backbone or other tubing. U.S. made reproduction used to clamp a Klaxon-3, Stewart Warner, or other push horn to a frame backbone or other tubing. Get notified by email when this product is in stock. Add To Cart Added!