Conductor's Special 844 Nightmare Edition Train Horn Kit

(Honking & Heavy Duty Pneumatic Use)


16 reviews

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Hear these horns now!

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.

An increasing number of people are using this for more than just blasting horns! With a system like the Conductor's Special 844K Nightmare Edition Train Horn Kit, you can also use the air supply to:

  • Adjust Tire Pressure
  • Heavy Duty Pneumatic Use
  • Inflate Water Toys and Safety Gear
  • Supply Air to Load Leveling Bags
  • Supply Air for Differential Lockers
  • Blow up Kids Toys
  • And lots more!

    While the Conductor's Special 844K Nightmare Edition Train Horn Kit is a complete onboard air system that provides you with everything you need to get up and going, be sure to add on a Wireless Remote, Tire Inflation Kit, or an Electric Drain Valve kit to get the most out of one of the best onboard kits you can buy!


    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!
    • Extremely durable & loud!
    • The horns are constructed from fiberglass-reinforced ABS for extreme durability through all harsh conditions.
    • Industrial grade stainless steel diaphragms
    • Extra-large 8-gallon air tank
    • Heavy-duty dual 444C air compressors
    • Capable of filling tires
    • Stainless steel liquid-filled air pressure gauge
    • All-inclusive train horn solution!
    • All standard mounting hardware
    • Max honk time: 14 to 16 seconds
    • Lifetime warranty on the Shocker XL train horns!
    • It can be heard from miles away!
    • 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 16 Reviews
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    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**********''


    Wow more than expected

    This horn set with the shocker xl upgrade is extremely loud I am beyond impressed with the quality and the sound worth every penny


    Extremely loud horns

    I installed these horn on my 2019 Chevy Silverado 2500hd and I put them where my spare tire goes. All the parts are well built and great craftsmanship. I added the 2 extra horns and made my own bracket. The 8 gallon tank fits perfect right next to my hitch receiver. This is a great product and you won't be disappointed.

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    Big boy

    Haven't had it installed yet, but damn glad I bought it!.

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