This is an old, VERY LOUD Radio Shack offering. The mounting bracket was attached to sides of horn by just a screw going into plastic. I put a phosphor bronze star washer between mount and plastic housing using a Aviation Stainless screw, drilled and installed a trilobal 0-42 Torx screw special made for plastic going through mounting bracket and into horn (to pin it in place) and then JB KWIKed. This is done on both sides.
Horn will be mounted inside port headrest. Added Tinnerman nuts to aid install.
Y10-06-11