Rivco Dual Air Horns AHHD Waterproof dualtrumpet air horns replace stock horn and give a loud warning blast of 128 dB Trumpets, mounts and brackets are triple-plated chrome Includes horn assembly, air compressor, relay, simple wiring, cone-shaped dust/bug covers and complete installation instructions Air compressor creates instant air pressure to the horns and mounts either under the seat, behind right side cover or down tube of frame (mounting position varies per model) Uses the stock horn button; bolt-on, plug-in installation