Air horns
DIY air horns - most require its own circuit and switch. Also have extra loud electric horns for 1-to-1 replacement.
http://www.wolo-mfg.com/air.htm
DIY air horns - most require its own circuit and switch. Also have extra loud electric horns for 1-to-1 replacement.
http://www.wolo-mfg.com/air.htm