Nathan AirChime K5LA Train Horn

Authentic Locomotive Horn & Loudest Available!


8 reviews

Add 1/2" Brass Electric Valve Kit Tooltip
Everything you need to hook-up your train horn to an existing onboard system.
Add 1/2" Manual Valve Kit Tooltip
Feather your sound just like a conductor with our 1/2" Manual Valve Kit.
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!
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Hear these horns now!


The most common question we get asked is, “What are your loudest horns?”  Well, here they are! The same horn used on most American locomotives for decades, the Nathan AirChime K5LA train horn. While there are many kinds of train horns, the Nathan AirChime K5LA is the golden standard that other train horns attempt to duplicate. With its massive size and intimidating tone, the Nathan AirChime K5LA proves that if you want a train horn, there really is no substitution for the Godfather of Train Horns. With its lower profile straight manifold, the LA style is the best choice for installs where you are limited on space vertically, but have plenty of room horizontally. 

As America's most popular train horn since the 1980s, the AirChime K5LA train horn is best known for its unusually upbeat and thunderous tone. Sought after for its looks as well as its sound, the Nathan AirChime K5LA is constructed with five large die-cast aluminum bells with stainless steel diaphragms, mounted on their famous low profile bracket. The AirChime K5LA train horn is built tough enough to withstand years of wear and tear from rain, snow, and sun for years. Put through hours of machine time until the tone is perfected, you don’t get higher quality than these horns. In a sea of pretenders, make sure you get the real deal.


  • Genuine Railway-Use Locomotive Tune Horn!
  • Durable Die-Cast Aluminum Body
  • Stainless Steel Dual Diaphragm Technology
  • Pre-Tuned One-Piece Bell Construction
  • Reversible Bells For Easy Installation
  • Manufactured by Nathan
  • Made in the USA! Quality Does Matter!
  • Horn: Airhchime K5LA Train Horn
  • Horn Length: 19″ (482.6 mm)
  • Horn Width: 29.75″ (755.65 mm)
  • Horn Height: 9.25″ (234.95 mm)
  • Horn Weight: 37 lb (16.78 Kg)
  • Port: 1/2" NPT
  • 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 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

Customer Reviews

5.0 Based on 8 Reviews
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Nicholas D.
United States United States

The god father.

Very pleased with the customer service and how responsive they were with my order and making sure everything was correct. Will say the k5la is the loudest horn I have ever seen or heard. Nobody cuts me off now.

HornBlasters Nathan AirChime K5LA Train Horn Review
Nicholas D.
United States United States

K5la god father of train horns.

I really like how overwhelming loud the horn is definitely a reason it’s a real train horn. Nothing else I have tried comes close.

HornBlasters Nathan AirChime K5LA Train Horn ReviewHornBlasters Nathan AirChime K5LA Train Horn Review
Nathan Q.
United States United States

Best Set of Train Horns You'll Ever Hear

I bought these back in 2017 (yes, it has been a while) and these K5LA horns have done nothing but out perform any and all my other friend's "train horns". They've even been completely submerged under water (they are installed where my spare tire used to be) during Hurricane Ike as I was driving around in high waters, filled with mud from when I go mudding, and lets not forget the sand that just gets blasted out of them from my beach trips. It's you are looking to purchase a high quality product you will not be disappointed with these horns. I had them powder coated to match the accents on my truck. When I purchase my next truck (and my current truck become my toy truck) I will be purchasing another set because I can't be without them. Now I just have to figure out how to mount some on my 2021 Can-Am Maverick. Oh, one last thing, they are freakin LOUD! Got some idiots that are in their car sitting on the railroad tracks at a red light, TRAIN HORN. Someone cuts me off in Houston traffic, you guessed it, TRAIN HORN. It's a quiet morning while camping and it's time for everyone to get up for breakfast, TTTRRAAIIINNN HHHOOORRRRNNN!!! Hope y'all enjoy these horns as much as I have!!

HornBlasters Nathan AirChime K5LA Train Horn ReviewHornBlasters Nathan AirChime K5LA Train Horn Review
William H.
United States United States

1 satisfied customer..!!

After purchasing an electric horn that was so saddening, and so weak that it was sad to honk. Saw a guy one day with horns underneath his truck. Pulled up next to him at a red light and ask him if they were loud. He said yes and to the horn. I was impressed. He said hornblasters'. Com for a set of shockers cost about 600. So like the person I am addicted to train horns got the K5. They are awesome. And did I mention that they are the loudest. The support team after my purchase that helped me troubleshoot was impeccable. Skip out replacement parts at no cost posthaste. Looking to upgrade soon to a 20 gallon tank for more hunk time. I talked nothing but good about hornblasters to everyone I speak with. Thanks again hornblasters you're the loudest and the best. One happy customer Bill from Loomis Ca...

HornBlasters Nathan AirChime K5LA Train Horn ReviewHornBlasters Nathan AirChime K5LA Train Horn ReviewHornBlasters Nathan AirChime K5LA Train Horn ReviewHornBlasters Nathan AirChime K5LA Train Horn ReviewHornBlasters Nathan AirChime K5LA Train Horn Review


Great customer service. Everything arrived on time, and was as described. They are definitely loud and sound great.

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