AirChime K5 Train Horn
AirChime K5 Train Horn Photo AirChime K5 Train Horn Photo AirChime K5 Train Horn Photo AirChime K5 Train Horn Photo AirChime K5 Train Horn Photo AirChime K5 Train Horn Photo
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Hearing protection required
Low Price: $1,584.99
Brand New, Available

AirChime K5 Train Horn

The AirChime K5LA is the god father of all train air horns! Still in use today, the AirChime K5 is used on commercial locomotives all around the country. This AirChime train horn is of the highest quality construction and guarantees amazing performance! The K5 incorporates five heavy duty die-cast kettle drum bells with a high flow five way manifold. The K5LA horn is the real deal: not only is it the loudest horns we’ve ever sold, but a genuine locomotive air horn. It doesn’t imitate the sound you hear from diesel locomotives; it is the sound you hear from diesel locomotives. You’ll be heard for miles with a set of these horns!


  • Genuine Railway Use Locomotive Tune Horn!
  • Die Cast Durable Aluminum Body
  • Stainless Steel Dual-Disk Diaphragm Technology!
  • Pre Tuned One Piece Bell Construction
  • Reversible Bells For Easy Installation
  • Manufactured By Nathan AirChime
  • Made In The USA! Quality Does Matter!


The K5LA Provides The Most Efficient Sound Amplification Possible!

This is quite possibly the loudest thing we have ever heard! The 5 aluminum kettle-drum bells and dual-disk diaphragms produce the loudest, clearest, locomotive horn sound possible! They sound with as little as 60 PSI

Highest Quality Construction Provides Years Of Train Horn Fun!

These horns are amazingly loud and will stay that way for years! Constructed of a die-cast manifold and bells with pre tuned single piece bell housings the K5LA is one of the most durable horns built. It features a patented double-disk stainless steel diaphragm that eliminates the typical pitch drop experienced in most air horns. This is a one of a kind sound in the air horn industry and makes this horn one of the most stunning horns around!

The 5 bells of the K5LA can be easily reversed for signaling in both directions and provide many installation possibilities! The aluminum finish is easily polished or powder coated for year of good looks and great sounds.

K5LA Videos

Horn with 38in Line at 100 PSI

Horn with Manual Valve

Horn on a Locomotive

Kit Includes

  • AirChime K5LA Real Locomotive Train Horn

Product Notes

The standard finish on this horn is unpolished die-cast aluminum. The horns are easily painted, or powder coated but they are not supplied this way.

This horn does *not* come with a valve. You must either purchase or supply a valve in order to operate this horn with your air system.


Use this product in a safe and responsible manner, at a distance of at aleast 100 feet from others.

Proper Hearing protection must be worn when using this airhorn. Hearing loss or permanent damage may result from unsafe use.

Never operate this product in a closed environment or close to pedestrians or others.

It is the consumer's responsibility to comply with local noise ordinances and D.O.T. sound level laws.

Used Horns Available

Used Nathan K5LA

These are by far the loudest and most expensive thing we sell! With that in mind, we would like to present the opportunity for you to save money with one of our recertified K5LA horns. All used K5LAs are returns from customers and have bean cleaned up if necessary. They are all tested to make sure they work, but may present some imperfections due to wear and tear.

If you're interested please continue to our K5LA used horn page.

Prop 65 Warning: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

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Part Number
Cast Aluminum
16.25″ (412.75 mm)
29.75″ (755.65 mm)
9.25″ (234.95 mm)
26.75 lb (12.13 Kg)
½″ NPT

Support Documents

You may download and print copies of this product's documentation below. Simply click the link for the document you wish to view.

All documents are provided in Adobe PDF Format. Click here to download the viewer.

Support Document IconK5 Complete Kit Manual Wiring/Plumbing Diagram