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Conductor's Special 844 Nightmare Edition Train Horn Kit

(Honking & Heavy Duty Pneumatic Use)


19 reviews

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You can never have too much onboard air! More air means longer blast time for your horns, more air for your tires, airbags, power tools. With our Conductor’s Special 844 Train Horn Kit, you get all the air you could ever need. With 8 gallons of air being powered by dual Viair 444C Air Compressors, you never need to worry about not having enough air to get the job done again.

Our Conductor’s Special 844 Train Horn Kit features our legendary Shocker XL Train Horns, one of the loudest train horns you can buy. Hand-tuned to US Train Horn Chord, you get the tone and the volume of an authentic locomotive horn in a compact solution. Incredibly durable, our Shocker XL Train Horns are constructed from an ultra-durable fiberglass-reinforced ABS composite with stainless-steel diaphragm and backed by a lifetime warranty against manufacturer defects.

Powering our massive black 8-gallon 8 port tank are dual Viair 444C Air Compressors, giving you a system that's capable of blasting your Shocker XL Train Horn up to 20 seconds continuously and refilling in only 2 minutes and 30 seconds! Whether you want to get the attention of distracted drivers or have plenty of air to fill up a flat, our Conductor’s Special 844 Train Horn Kit is a complete system that makes sure you always have the air you need.

  • The loudest horns we manufacture, be heard for miles!
  • Stainless steel internals combined with the fiberglass-reinforced ABS construction ensures these horns are extremely durable through all conditions!
  • Individually mounted horns for flexible installation
  • All-inclusive train horn kit with everything needed for installation
  • 150 PSI 8-gallon air system provides 13-15 seconds of honk time
  • Capable of filling tires and using small air tools


This video shows our Shocker XL Train Horn in a third-party decibel test alongside your typical "air horn" honked side-by-side at the same pressure. As you can see, no one even comes close to the insane volume and tone of our Shocker XL Train Horns!
  • Part Number: HK-S4-844K
  • Operating Pressure: 150 PSI
  • Restart Pressure: 110 PSI
  • Voltage: 12-Volt DC
  • Horn: Shocker XL train horn
  • Horn Material: High-impact fiberglass reinforced ABS
  • Horn Measurements   
  • № 1 19.50″ (495.30 mm) № 2 16.25″ (412.75 mm)
    № 3 14.75″ (374.65 mm) № 4 12.75″ (323.85 mm)
  • Horn Flare: 6.5″ (165.1 mm)
  • Air Tank: HornAir 8-gallon 8 port air tank
  • Tank Length: 32.5″ (825.5 mm)
  • Tank Diameter: 10.5″ (266.7 mm)
  • Tank Height: 12.5″ (317.5 mm) (With Legs)
  • Tank Weight: 32 lb (14.51 Kg)
  • Air Compressors: Dual Viair 444C air compressors
  • Fill Time 0-150 PSI: 6 Minutes 40 Seconds
  • Air Flow: 1.67 CFM
  • Max Amperage: 38 amps
  • Maximum Duty Cycle: 100% @ 100 PSI
  • Compressor Length: 11.5″ (292.1 mm)
  • Compressor Width: 4.30″ (109.22 mm)
  • Compressor Height: 6.5″ (165.4 mm)
  • Compressor Weight: 11 lb (4.99 Kg)

8-Gallon Air Tank Dimensional Drawing

0 3.53 25 0 100.0 25
10 3.25 27 1.0 88.5 29
20 2.97 31 2.0 81.3 33
30 2.86 33 3.0 75.6 34
40 2.72 34 4.0 70.6 36
50 2.58 35 5.0 65.5 37
60 2.47 36 6.0 59.0 39
70 2.35 37 7.0 53.1 40
80 2.19 38 8.0 47.7 39
90 2.03 39 9.0 43.2 39
100 1.90 40 10.0 38.8 38
110 1.74 40 11.0 34.7 37
120 1.65 39 12.0 30.6 36
130 1.53 39 13.0 25.8 34
140 1.41 38 14.0 23.8 33
150 1.32 38
160 1.22 37
170 1.13 36
180 1.00 35
190 0.89 34
200 0.85 33

* Supply Voltage: 13.8 Volts

0 to 150 PSI 5 min. 25 sec. (± 10 sec.)
110 to 150 PSI 2 min. 05 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
    Shocker XL train horns are backed by our lifetime Manufacturer's defect warranty. The Viair air compressor is backed with a 1-year Manufacturer's defect warranty. The rest of the components are backed with a 2-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

Customer Reviews

5.0 Based on 19 Reviews
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Filter Reviews:
Ernest A.
United States United States

Just Don't Cut Me Off!

This setup was put on a 2018 Ford Focus ST. The tank and with two compressors were installed inside in the rear. I removed the space saver spare (which is useless anyway and I have Triple "A") to keep the equipment environmentally clean and in reality, was the only place to put them. When both compressors kick in, in my opinion are quiet. The 4 horns were installed nicely in the rear below the spare compartment. With two horns facing port side and two horns facing starboard side, as to not be too loud in the cabin, they produce a commanding sound. I highly recommend "The Conductors Special Nightmare Edition".

HornBlasters Conductor's Special 844 Nightmare Edition Train Horn Kit ReviewHornBlasters Conductor's Special 844 Nightmare Edition Train Horn Kit ReviewHornBlasters Conductor's Special 844 Nightmare Edition Train Horn Kit Review

Great horns and on board air

Good, I love having the horn and I used the on board air frequently.


Big Boy Horns for my Big Boy Truck!

These horns are great!! Now that I have them installed in my truck, I actually look forward to idiots in traffic. I custom fabricated my own horn rack to go in the box of my truck. They may be out of sight but definitely not out of earshot. I've had them in my truck for just over a week now and look forward to any excuse to use them. Thank you HornBlasters for making an awesome product and for all your help through the ordering process to shipping them to my home in Canada. You guys are great!! Brian H

HornBlasters Conductor's Special 844 Nightmare Edition Train Horn Kit ReviewHornBlasters Conductor's Special 844 Nightmare Edition Train Horn Kit Review
German M.
United States United States


Fantastic product; it's loud, very loud. It's already kept me from getting hit by distracted drivers. Big enough tank that I've been able to connect tools with no issues. I have also used it to inflate river tubes and other floats. I will be recommending this product and will also be purchasing a motorcycle horn.


the best horn kit of the World

for more pictures and videos follow me on Facebook ''R*** D**********''