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Nathan AirChime K5HA 540 Train Horn Kit

(Fastest Filling to Continue Honking!)


1 review

Suggested Addons
Add Viair Air Compressor Bracket Tooltip
The Viair Air Compressor Bracket will allow you to mount your compressor upright and is compatible with Viair Compressor models 275C-485C.
Add Dual Viair Air Compressor Brackets Tooltip
The Viair Air Compressor Bracket will allow you to mount your compressor upright and is compatible with Viair Compressor models 275C-485C.
Add Dixie Musical Horn Tooltip
The Song of the South is available for your vehicle with our Dixie Musical Air Horn System.
Add Electric Drain Valve Kit Tooltip
This kit has everything you need to drain your tank from the push of a button from inside the cab!
Add 220 PSI Digital Pressure Gauge Tooltip
Using a tank mounted sensor wired directly to your gauge, our 220-PSI rated Digital Air Pressure Gauge delivers unparalleled accuracy with microprocessor stabilized readings.
Add AirChime Mounting Bracket Tooltip
This heavy duty pedestal mount gives you the ability to install the horn with enough clearance to connect airline directly to the bottom of the base!
Add 400C Dual Air Compressor Upgrade Tooltip
Double your performance with the 400C Dual Compressor upgrade. Recharge your tank faster and honk more often.
Add Gold Extended Warranty Tooltip
1 year add-on to existing warranty. Does NOT cover accidental damage, no advanced replacement.
Click here for more information!
+See price at checkout
Add Platinum Extended Warranty Tooltip
2 year add-on to existing warranty. DOES cover accidental damage and advance replacement.
Click here for more information!
+See price at checkout

Want the loudest blast and want it fast? We paired our absolutely loudest train horns with our fastest-filling onboard air system and the result will blow you away! With our Nathan AirChime K5HA 540 train horn kit, you a get massive, authentic train horn, 5 gallons of air, and a lighting-fast air compressor, what more could you ask for in a train horn kit?

There is no mistaking the raw power and beauty of the iconic Nathan AirChime K5HA train horns. They are, hands-down, the loudest train horns you can buy. Made with die-cast aluminum and stainless steel diaphragms, Nathan Airchime train horns were built to withstand decades of abuse from the elements and have been the train horn of choice for many US Locomotives since the ’70s. The K5HA, in particular, are sought after for their T-shaped manifold and are rarer than their straight-manifold counterpart, the K5LA.

Massive train horns such as the Nathan AirChime K5HA require an onboard air system that can hold its own. Our HornAir 540 onboard air system does that and then some! It includes Viair’s fastest-filling air compressor to date, the Viair 400C air compressor. If the 5 seconds of continuous blast time that our 5-gallon tank provides isn't enough to get your point across, our Nathan AirChime K5HA 540 can recharge from 110 to 150 PSI in only about a minute and a half! As with all of our kits, our Nathan AirChime K5HA 540 is a complete horn kit with all hardware and instructions included. 

  • Railroad-use train horn!
  • Heavy-duty 400C air compressor for faster fills!
  • Extra-large 5-gallon air tank
  • Max honk time: 5 seconds
  • Part Number: HK-K5-540
  • Operating Pressure: 150 PSI
  • Restart Pressure: 110 PSI
  • Voltage: 12-Volt DC
  • Horn: Nathan AirChime K5HA (K5 high mount American tune)
  • Horn Material: Cast Aluminum
  • Horn Length: 19″ (482.6 mm)
  • Horn Width: 18″ (457.2 mm)
  • Horn Height: 12″ (304.8 mm)
  • Horn Weight: 37 lb (16.78 Kg)
  • Horn Air Inlet: ½″ NPT
  • Air Tank: HornAir 5-gallon 8 port air tank
  • Tank Length: 20.5″ (520.7 mm)
  • Tank Diameter: 9.5″ (241.3 mm)
  • Tank Height: 11.5″ (292.1 mm) (With Legs)
  • Tank Weight: 20 lb (9.07 Kg)
  • Tank Ports: x7 1/2" NPT, x1 3/4" NPT
  • Air Compressor: Viair 400C air compressor
  • Average Fill Time: 1 Min 30 Sec
  • Air Flow: 2.54 CFM at Free Flow
  • Max Amperage: 26 amps
  • Maximum Duty Cycle: 33% @ 100 PSI
  • Compressor Length: 9.0″ (228.6 mm)
  • Compressor Width: 4.0″ (101.6 mm)
  • Compressor Height: 7.05″ (179.07)
  • Compressor Weight: 8.00 lb (3.63 Kg)

5-Gallon Air Tank Dimensional Drawing

0 2.62 16 0 74.0 16
10 2.39 18 1.0 65.0 20
20 2.21 20 2.0 60.0 23
30 2.11 22 3.0 56.0 25
40 2.01 24 4.0 53.0 27
50 1.93 25 5.0 49.0 28
60 1.84 26 6.0 46.0 28
70 1.73 27 7.0 42.0 28
80 1.65 27 8.0 38.0 28
90 1.52 27 9.0 35.0 27
100 1.45 27 10.0 31.0 27
110 1.35 27
120 1.26 27
130 1.19 27
140 1.08 27
150 1.01 26

* Supply Voltage: 13.8 Volts

0 to 145 PSI 4 min. 50 sec. (± 10 sec.)
110 to 145 PSI 1 min. 40 sec. (± 05 sec.)

* Supply Voltage: 13.8 Volts

  • Money-Back Guarantee/Refund Policy
    All merchandise unless otherwise indicated may be returned within 30 days from the shipment arrival date for a refund. A Returned Merchandise Authorization (RMA) number is required for all returns. A 15% restocking fee may apply. Additional deductions may be made to reflect the products current market value. These terms apply to all refunds. Most products are shipped with a refund/replacement guarantee period unless otherwise noted in the product listing. Customers must inform of any order discrepancy within 7 days from the invoice date so that we may investigate and resolve the situation accordingly.
  • Warranty
    This product is backed by our One-Year Manufacturer's Defect Warranty!
  • Satisfaction Guarantee offers our customers a 30-day satisfaction replacement or refund guarantee on all purchases, except when otherwise noted in the product listing.
  • Cross-Shipments will not cross-ship returned merchandise.
  • Physical Damage Policy
    Physical damage to any product purchased at will effectively void warranty coverage. Physical damage includes but is not limited to improper handling and/or any other type of damage sustained by irregular usage.

Warnings & Notices

Hearing Loss warning icon
Hearing Protection Required

This product produces extreme loudness. Proper hearing protection must be worn at all times during its operation. Hearing loss or permanent damage may result from unsafe use. Use this product in a safe and responsible manner and at a distance of at least 100 meters from others. Never operate this product in a closed environment, in close proximity to living beings, or where prohibited by law.

Safety warning icon

This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to

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Best train horn equipment ever made!

Not only did I buy one full kit, I also bought a second horn. It is by far the loudest, most bad *** horn I have ever had or heard. I've had three other train horn kids, and none of them come close to the Nathan K5. I was blown away, very literally the first time I heard it. If you are looking for the loudest most bad *** train horn available this is definitely the one to get. If you would like to see my videos on the train horns, look me up on YouTube at Tyler Faix for multiple videos.