Super Loud Snail Air Horn Siren 300Db

Most factory horns are built to a price, and they sound like it

The horn fitted to a scooter, a commuter bike or a budget hatchback is usually the cheapest part that will still pass inspection. It is adequate in a parking lot and close to useless on a highway on-ramp, where the one thing you need is for the driver drifting into your lane to look up.

This is the replacement: a single high-tone snail horn that bolts on where the old one came off, and asks to be noticed.

One bolt, and it is on

The horn hangs from a flat steel strap with a single punched hole, held to the body by a chrome flange nut on the center stud. Find the bracket the old horn came off, pass one bolt through the strap, tighten it. There is nothing to calibrate and nothing to align beyond pointing the face where you want the sound to go.

• Single-bolt steel strap — reuses the mounting point the original horn used on most bikes and scooters.
• Molded splash hood — a curved plastic shroud sits over the top of the housing and shields the face from spray thrown up from in front.
• Sealed front face — the face is a closed disc carrying a printed decal, not an open grille.
• Two spade terminals — standard flat male blades, so ordinary insulated spade connectors push straight on.

What ships, and what you will need to add

This is the part the old listing never made clear, so here it is plainly. The box contains the horn, with its bracket already bolted to it. It does not contain wiring, and it is not a plug-in kit.

Wiring it through a relay with an inline fuse keeps that current off the handlebar switch or the steering-column stalk, which is the standard way this job is done and the reason most proper horn kits ship a relay in the box.

If you are not comfortable adding a relay and a fuse to a vehicle’s electrical system, this is a job worth handing to an auto electrician. It is a short one for somebody who does it often.

It is loud on purpose. Treat it that way.

A horn only does its job by being unpleasant, and this one is built to carry over traffic and through a helmet. That is the point of it. It is also the reason it deserves some respect once it is wired up.

• Never sound it beside your own head. Testing it on the bench with an ear near the face is the easiest way to hurt yourself with it.
• Point the face away from sidewalks where the fitting allows. Forward and slightly down is the usual aim, and the kindest one.
• Wear ear protection if you bench-test it. A horn held in the hand indoors is far closer to your ears than one bolted to a bike.
• It is a warning device, not a toy. Sounding it at somebody at close range can genuinely hurt them, and in most places it is an offence.

For context: NIOSH sets its recommended workplace exposure limit at 85 dBA averaged across an eight-hour day, and recommends no unprotected exposure at all above a 115 dBA ceiling. Vehicle horns of this type sit above that ceiling at close range, which is exactly why they work.

What it fits

Any vehicle running a 12 volt negative-ground system with somewhere to bolt a bracket: motorcycles, scooters, quads, most cars and light vans, boats and riding mowers among them.

• 12 V systems only. Do not fit it to a 6 V classic, and do not fit it to a 24 V system — many heavy goods vehicles, buses and some agricultural machines run 24 V, and this horn is not built for it.
• You need a bracket or a flat point to bolt to. The strap takes one bolt; it does not clamp around a tube on its own.
• Check the space first. It is a small unit, but it still wants clearance in front of the face for the sound to leave, and clearance behind for the terminals and their connectors.

Specification

Height, depth and bracket-hole diameter are taken from the supplier’s dimensioned drawing for this part. We do not publish a decibel figure for this horn. The supplier quotes a loudness number but states no measuring distance for it, and a decibel figure without a distance does not describe anything — the same horn can be quoted two ways and both be technically true. If we obtain a rating measured at a stated distance, it will appear here.

Heard first, seen second

One bolt, two spade terminals and a tone that carries. Add a fuse and a relay, aim it away from the sidewalk, and it will do the one job it has.