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Frequently Asked Questions
What is the loudest car horn?
The Nathan AirChime K5 and our King 5, both at 149.4 dB. The K5 is an authentic five-bell train horn pulled from retired locomotives and still used on railroads today, and we manufacture the King 5 ourselves. Our Shocker XL comes in right behind them at 147.7 dB.
What is the loudest horn without an air compressor?
The Sniper Electric Horn is the loudest horn we carry that works without an air system. The install is just mounting and wiring. Watch out for listings selling a no-compressor "train horn": a real train horn needs 50+ PSI of stored air to honk correctly.
Is there a loud horn that just replaces my factory horn?
Yes, our Sniper Electric Horn. There's no tank or air system to install, just mounting and wiring. If you want far more volume than any electric horn can give, that's when you step up to one of the complete air horn or train horn kits.
What is the loudest car horn that's still legal?
There's no federal loudness limit on vehicle horns, so the loudest legal horn depends on your state's laws. Our 50-state law guide covers yours in a couple of minutes. Owning and installing a loud horn is legal in most states, and drivers who use them as a safety measure typically never have an issue.
What is the loudest 12-volt horn?
The King 5 and Nathan AirChime K5 train horn kits: both hit 149.4 dB and run on a standard 12-volt electrical system. The compressor's main power comes from the battery through a relay, and an ignition source switches the relay, so the kit only runs while the vehicle is on. If you mean 12 volts with no air system at all, that's the Sniper Electric Horn, the loudest electric horn we carry.