Ultimate Nathan AirChime K5 Train Horn Kit

(Premium Kit With Quick Filling & Heavy Duty Onboard Air)


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Hear these horns now!


So you want the most ridiculously stacked kit HornBlasters has to offer? Look no further! We asked people, "if you could build a kit any way you want, the sky's the limit, how would you build it?" What resulted is our Ultimate 12485 kit.

Here are the details:

We start with the absolute loudest train horn available. The Nathan AirChime K5LA. There is simply no substitute for the sound that comes out of this horn. These massive horns are made in the USA from die-cast aluminum with stainless steel diaphragms. They're built to withstand years of abuse from the elements, and the volume is something you will not only hear but feel as well. Hands down, the king of train horns.

Next up, we give you one of the biggest air tanks we carry, our 12 gallon 8 port air tank. This thing is HUGE! It's the right choice for this beast of a kit with plenty of air to run your air tools, your horn, air lockers, you name it. The tank features 8 ports: seven 1/2" ports and one 3/4" port with a max working pressure of 150PSI and a burst rating of 300PSI. This tank should give you enough capacity to blast your K5 for 10 seconds straight!

Ok, so we know you get the massive train horns & the gigantic air tank, what else could we have up our sleeve to power such a monster system? How about four Viair 485C platinum compressors? These are the most powerful, rugged constant duty compressors Viair makes. Four of these 485C compressors will fill your 12 gallons of air without breaking a sweat and can recharge the tank from 110 PSI to 150 PSI in just two minutes and forty seconds!  

So we've covered the insane parts that make up the heart and soul of our Ultimate K5 kit. Let's talk about all the extras that we include as well. We've thought of everything, and then we put it into the kit to make sure you are covered no matter the situation. Some of the other extras we include in this kit are:

  • The 1/2" electric drain valve kit to let you drain condensation from the tank remotely.
  • Four Viair cooling fan isolator kits. These are known to improve the performance of the compressors significantly. 
  • Our air relocation kit so that you can have another air outlet for inflating tires, toys, or running shop tools.
  • A wireless horn activation remote with wiring kit included. This means you can trigger your BAMF kit from across the parking lot if you want.
  • Our 220 PSI digital air pressure gauge so you can keep track of exactly what the pressure is in your 20-gallon tank at all times.
  • A HornBlsters 180PSI digital tire inflation gun kit for all your inflation needs.
  • A Viair blowgun, great for cleaning off dirt and mud, or blowing up inflatables.
  • Plus various odds and ends to help you keep this kit blasting for a long time to come.
  • Railroad-Use Train Horn!
  • Heavy Duty 485C Air Compressors
  • Heavy Duty Pneumatic Use
  • Extra Large Twelve Gallon Air Tank
  • Max Honk Time: 12-15 Seconds
  • Part Number: HK-K5LA-12485
  • Horn: Nathan AirChime K5LA (K5 low mount American tune)
  • Material: Cast aluminum
  • Horn Length: 19″ (412.75 mm)
  • Horn Width: 29.75″ (755.65 mm)
  • Horn Height: 9.25″ (234.95 mm)
  • Horn Weight: 26.75 lb (12.13 Kg)
  • Horn Port: ½″ NPT
  • Tank: HornAir 12 gallon tank
  • Volume: 12 gals (45.42 L)
  • 1/2" NPT Ports: 7
  • 3/4" NPT Ports: 1
  • Tank Length: 44″ (1117.6 mm)
  • Tank Diameter: 10″ (254 mm)
  • Tank Height: 12.5″ (317.5 mm) (With Legs)
  • Tank Weight: 37 lb (16.78 Kg)
  • Compressor: Viair 485C air compressor
  • Voltage: 12 volts DC
  • Air Flow: 2.24 CFM at free flow
  • Max Amperage: 23 amps
  • Maximum Duty Cycle: 100% @ 200 PSI
  • Maximum Working Pressure: 200 PSI
  • Compressor Length: 10.63″ (270 mm)
  • Compressor Width: 4.1″ (104.14 mm)
  • Compressor Height: 6.44″ (163.57 mm)
  • Compressor Weight: 11.1 lb (5.03 Kg)
0 2.24 12 0 70.0 12
10 1.84 14 1.0 51.0 15
20 1.75 16 2.0 47.0 16
30 1.67 17 3.0 44.0 18
40 1.61 18 4.0 41.0 20
50 1.54 19 5.0 38.0 21
60 1.47 20 6.0 35.0 21
70 1.42 21 7.0 32.0 22
80 1.36 21 8.0 29.0 22
90 1.30 22 9.0 27.0 22
100 1.23 22 10.0 25.0 23
110 1.17 22 11.0 22.0 22
120 1.11 22 12.0 21.0 21
130 1.06 22 13.0 21.0 21
140 1.01 23 13.8 21.0 21
150 0.97 22      
160 0.92 22      
170 0.88 22      
180 0.84 21      
190 0.77 21      
200 0.73 21      

* 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 HornBlasters.com 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!
  • HornBlasters.com Satisfaction Guarantee
    HornBlasters.com offers our customers a 30-day satisfaction replacement or refund guarantee on all purchases, except when otherwise noted in the product listing.
  • Cross-Shipments
    HornBlasters.com will not cross-ship returned merchandise.
  • Physical Damage Policy
    Physical damage to any product purchased at HornBlasters.com 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 www.p65warnings.ca.gov.

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