BEHEMOTH-i Train Horn 152db | Viair 280c Compressor 1g 150psi Kit


BEHEMOTH-i 152db Locomotive Style Inline Triple Trumpet Train Air Horn and Viair 280c Compressor and 1 gallon tank 150psi Medium Duty On Board Air System OBA.  If room is an issue you want this kit with only a 1 gallon air tank.  Installer can reconfigure trumpets to fit small places. This earth shaking air horn is an absolute beast that will literally blow you away. The Viair 280c on board air system is not only great for powering the air horns but you can also fill a tire in an emergency.  SEE VIDEO IN DESCRIPTION.

6 in stock

Add Horn Switch
Add Tire Fill Hose
Compressor Upgrades


BEHEMOTH-i Train Horn 280c

Assured Performance Products
152db BEHEMOTH-i Train Horn
Viair 280c Compressor – 1 Gallon Kit

Inline Triple Trumpet Air Horn 150psi Kit

Check Out our Video Below.
Actual Horn in the FORD Excursion-See Video.

This video does not do justice to just how loud this 152db Behemoth Train Horn really is!!
The Kit is perfect for Large Cars, Trucks and SUVs.
Great for RVs, OHV and Big Rigs.
The Behemoth-i trumpets are removable from mounting plate.
This Horn is SO Loud it will Shake the Ground.
The Air System can be mounted in any position.
The trumpets can be configured so you can the horn fit most vehicles.

The Viair 1 Gallon Air System easily can mount in car’s trunk..
..the bed of a pickup or UTV..
..or even storage hold of RV.
Can also be mounted under vehicle as well
This Air System is considered an underbody kit
This Viair Air System can also be used for emergency tire inflate of small tires, air lockers, air springs, etc.
We give you options for compressor upgrades.
Quick and Easy Install For Experienced Techs.

Behemoth-i Air Horn Specs:

Part# ACHRSK-663
DB: 152 @ 10M(150psi)
Solenoid(Electric Air Valve): Included (12v/24v).
Trumpets: 3
Trumpet Diameter: 6.25”
Trumpet Lengths: 12.3”, 14.5”, 16.6”
Overall Dimension: 18.75” Long x 16.1” Wide x 6.5” Tall
Trumpet Material: CHROME Plated Zinc(non-corrosive)
Mounting Hardware: Included
*Mirror Finish-Trumpets will look like new for years to come
*Trumpets can be removed from mounting plate for custom installs
*Inline Trumpet Mounting
*Can fit these trumpets in tight areas like behind a bumper.
*Oversized Hi-Flow Air Solenoid

VIAIR Compressor Kit Specs:

VIAIR 280c Compressor
150psi (30% Duty @ 100psi).
Duty Cycle Explained-CLICK HERE
12 Volt
Amp Draw: 16 amps.
Stainless Steel valves and Bearing.
Min./ Max. Ambient Temp: -40F. / +158 F.
Includes 1/4” Stainless Steel braided feeder line
Nickel Plated Inline Check Valve
Compressor Dimensions: 7.8” L. x 3.95” W. x 6.35” H.
1.0 Gallon Tank – 1/4″ NPT Ports(x4)
Air Tank Dimension: 10.25″L. x 6.0″W. x 7.5″H.

This On Board System Includes:
*30 amp Relay.
*Pressure Switch (110psi ON / 145 psi OFF)
1/4 NPT M x 1/8″ NPT F Reducer
1/4″ NPT M x 1/4″ Tube Comp Fitting
1/8″ NPT M x 1/4″ Tube Comp Fitting
1/4″ NPT M Plug(x2)
175psi Safety valve
*20 Feet Air Lines Tubing
*Nuts/ Screws/ Washers for Compressor and Tank
*Complete Instructions.
*VIAIR 1 Year Warranty against Defects

1 Gallon Tank Fill Rate w/VIAIR 280c Compressor
0 to 105 PSI —–1 Min. 10 Sec.
0 to 145 PSI —–1 Min. 40 Sec.
85 to 105 PSI—- 0 Min. 25 Sec.
110 to 145 PSI—-0 Min. 40 Sec.

Need a LARGER, more Heavy Duty Compressor??
We have Compressor Upgrade Options.

Behemoth-i Triple Trumpet Air Horn- Viair 280c 1G OBA

This Behemoth-i Train Horn Viair 280c Compressor 1G OBA makes for a Super Loud, earth shaking train air horn that will get you noticed and will wake up inattentive drivers that share the road with you. The Behemoth-i Train Horn will work in cars, RV, SUV, Semi’s and of course make for a great pickup truck air horn. The Trumpets can be removed from mounting plate.

Your installer can then reconfigure the trumpets into tight mounting areas of vehicle. This air horn has zinc trumpets that will not rust. The diaphragm housing are made of cast aluminum polished to a mirror finish. The Behemoth train air horn line is not for the average person, this horn is extremely loud.

This Viair on board air system produces a whopping 150psi. The Behemoth-i Train Horn with Viair 280c compressor is 30% Duty at 100psi. and is considered light duty in the Viair line.

More Than Just An Air Horn Kit…

The Behemoth-i Train Horn Viair 280c 1 Gallon Tank is an air advantage when using this air system. Simply put, it fills faster and less compressor run time.. This Viair Kit is perfect for air supply for this horn, air spring kits or air lockers and even filling small tires with air. The kit includes the Viair patented air filter relocation kit. This way the 280c air compressor can be mounted under the vehicle and filter can be in a location that is clean.

Ideal places for the air filter is in engine compartment or inside the vehicle cabin under a seat or under a bed rail is also ideal. This will extend the life of the compressor greatly. Our Viair heavy duty kit includes a 110psi ON and 150psi OFF pressure switch which allows the air system to always maintain proper air pressure in the tank. The kit includes all the necessary fitting for install.

Purchase with confidence, we are an Authorized VIAIR DEALER.

Need A Horn Switch?

You can use OE Horn Switch (steering wheel) to activate solenoid.
You don’t want to use your OE Horn Switch??
Choose option to include Horn Button Switch.
Do you want to Look and Feel like a Big Trucker???
Choose option to include Manual Air Valve Kit w/Lanyard
Assured Performance

Add Optional Tire Fill Air Hose

Choose 1 of 2 VIAIR Tire Fill Hose Kit options below:

The first of the two options (Yellow Hose Kit-Top of Pic Below) is Viair 35′ Coil Air Hose and is 200psi rated. This kit includes a Female Quick Connect fitting and Male Quick Connect Studs(2). Also includes a tire chuck. (PN:ACV0037-KT)

The second of the two options (Digital Hose Kit-Bottom of pic) is the Viair Digital Tire Fill 30′ Hose Kit. Includes Digital Tire gauge that reads 0-200psi. Also includes a canvas protective carrying case. (PN:ACV00044)
CLICK HERE for Digital Tire Fill Kit Info

BEHEMOTH-i Train Horn 280c Viair Tire Fill Hose Kit and Save

Add Air Gauge & ON/OFF Switch

A lot of installers prefer installing an air gauge for the on board air system. Add this gauge and save some money off buying separately.

This wiring kit includes gauge, on/off switch, 20 feet of 16g wire, 20 amp inline fuse, electrical connectors & zip ties.

BEHEMOTH-i Train Horn 280c Viair Wiring Kit & Gauge and Save

Add Compressor Mounting Bracket

This bracket will make mounting your compressor a little easier. You can weld or bolt this bracket to vehicles frame, then simple bolt the compressor to this bracket. This will save the installer a lot of install time.

Add A Viair Wiring Kit & Gauge and Save

Get ‘Er A Little Louder…

Get a little more from this Behemoth horn when you upgrade to larger tubing & air valve(solenoid) and all the needed fittings. The larger tubing and solenoid allows more air volume means little louder the horn.

BEHEMOTH-i Train Horn 280c Upgrade to Large Tubing and HD Air Valve

*For Continental U.S. Shipments ONLY


Additional information

Weight 49 lbs
Dimensions 28 × 24 × 10 in


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