Stebel Nautilus Compact Dual-Tone 12-Volt Motorcycle Air Horn, 139 dB, Black

$85 $89.95
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Only 2 units left

Dual-tone black Nautilus Compact air horn from Stebel.

Loud enough to convince other drivers that there's a derailed freight train barreling down on them. Don't press the horn button in the garage, it hurts! At 139dB it can be heard for almost 3 city blocks!

Includes a single M8 mounting bolt and nut, as well as a relay for providing a direct, high current attachment to the motorcycle's battery.

Per the manufacturer, this horn should be mounted so that the cylinder is vertical (with the horn facing down). There should be no more than a 15 degree variance from the vertical position. If it is not mounted per these specifications, then the horn may cease to function after a period of time.

If you own a 2003-2005 Harley Davidson motorcycle and horn relays are repeatedly failing, please visit your local dealership to upgrade your horn button under the Harley recall.

No wires, fuses, or bike-specific mounting brackets are included.

You may want to purchase the pre-made wiring kit & brackets.

Denali Plug-N-Play wiring kit

Keep this in mind: sound energy doubles for every 3 points you go up in the decibel scale. It means that the Stebel Nautilus horn, which produces 139 dB of sound, puts out a LOT more sound than these popular horns:

- 800% of the sound energy of the more expensive 130dB FIAMM Freeway Blaster;
- 600% louder than the $140, 130 dB Pro Pad Mini Beast horn;
- 650% louder than the $179, 128dB Rivco dual trumpet horn.

You will not be disappointed - just make sure you wire the included relay properly, as replacement horns used without a relay don't get enough electrical current to be fully effective.

Technical specifications:

Sound Output: 139 dB
Operating Voltage: 12 Volts
Absorbed Current: less than 18A
Fundamental Frequency: 530 Hz & 680 Hz
Weight: 0.6 kg (1.3 lbs)
Dimensions: Approximately 4.8” x 4.5” x 3” or 125 x 112 x 78mm
Reaction time: less than 90 milli-seconds

MATERIALS (not included with horn):
14 to 16 gauge wire, 10 ft - 20 ft length (more than enough)
splice-in wire connectors ....... uuummm, maybe not (keep reading)
female blade-style quick disconnects
3 ring connectors for attachment to battery terminals, or not (read below)
1 in-line fuse holder with 30 amp automotive fuse
weather resistant electrical tape (or just use weather-sealed heat-shrink connectors) or better yet..... use our Posi connectors and one of our fine fuseblocks!!

Check out this sound!!!

Confirmed fit list

R1200GS (use custom bracket made from strap steel)
F650GS & F650GS/Dakar ( use a double L-bracket made of strap steel)


Harley Davidson
Low-rider, '95
Soft-tail Springer Classic

CB250 Nighthawk
CBR1100XX Blackbird (use TWT-00-013-001 2.5" L Bracket and see installation tutorial)
GL1100 Goldwing (Left side, under front fairing)
ST1100 (mount to radiator support inside right-side locking dash compartment)
ST1300 (mount to support inside right-side locking dash compartment)
VFR1200FA (mount under the front left fairing)
VT1100 Shadow Aero (mounts in original horn location)

Concours 2009
KLR650A, -'07 (use TWT-00-013-001 2.5" L Bracket)
KLR650E, '08- (use TWT.HMT.08.004.100 mount kit for the KLR650E)
Ninja 650R, '06 (requires drilling a small hole in a stiffener of the instrument cluster)
Vulcan 1600 Classic, '05

AN400 Burgman
DL650 V-Strom (use HMT.05.821.10000 )
DL1000 V-Strom (use HMT.05.821.10000 )
GSF600 Bandit
GSF1200 Bandit
Intruder VL 1500
Intruder LC 1500
S40 Boulevard
SV650, '03- Alternately, can be placed in the right front fairing.

Bonneville (see photo)
Sprint ST 955i, -'04
Tiger 955i
Victory 8 Ball
Vegas Jackpot

Yamaha FZ1, '01-'05
VMAX with L bracket behind the right hand side of the radiator.
V-Star 1100 Classic (mount between front frame downtubes)
V-Star 650 Classic/Silverado - mount on the factory engine guard
XV1700 Road Star Warrior, all years (mounts to original right-side horn mount using MHI.154 bracket with one additional hole drilled by installer. 2.5" L Bracket)

Customer Reviews

Based on 21 reviews
Antony Niro
It’s Loud

Loud and easy to install in my 2014 Fiat 500 Turbo. Only caution is if it gets any contact with winter weather you’ll be replacing the horn yearly. The anti corrosive version is no better and not as loud.

Great in a Mazda MX-5

I installed it in my Miata MX-5 3 years ago. Love it; gets you the respect that the scooter-like OEM horn does not. Still working fine...

Had to replace my horn!

Great horn. Due to improper mounting, I lost the first one. My bad! It’s good enough to buy a second one. It’s loud enough to scare my wife in the garage

Ben Nolin
Freight train....

Aside from the birthday candle headlight I replaced, this air-horn has been one of the best upgrades. The stock meep meep was embarrassingly useless. At 139 db this thing blasts and turns heads for blocks. I rigged up a easy and simple custom bracket and it blends and tucks right in.
Deserving people/idiots have jumped out of their seats which eases my extreme annoyance by providing me a few laughs. Tooted it for my wife...she jerked, frowned and walked away. HAHA. Buy it.

Hekmat Hotaki

Stebel Nautilus Compact Dual-Tone 12-Volt Motorcycle Air Horn, 139 dB, Black

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