DENALI SoundBomb Compact Dual-Tone Motorcycle Air Horn Kit | Replace the original horn on your motorcycle with the attention grabbing DENALI SoundBomb Compact Dual-Tone Air Horn Kit. As the name implies, the SoundBomb emits a loud blast that is nearly impossible to ignore by even the most distracted motorists and with 120 decibels of sound output measured at 3 feet, the SoundBomb is 4 times louder than a standard motorcycle horn.4.7/5(15) Denali Soundbomb Compact Air Horn And Wiring Kit - RevZilla Denali Soundbomb Compact Air Horn And Wiring Kit. The Denali Sound Bomb is eight times louder than a standard motorcycle horn! At 120 decibels, cagers of all shapes and sizes will jump out of your way! The unique design of the Denali compact horn features a rugged molded clamp that mechanically mates the compressor to the acoustic unit.