Conductor's Special 8OB2 Fast-Fill Train Horn Kit

(Honking & Heavy Duty Pneumatic Use)


Add Wireless Activation Remote Tooltip
Activate your horn wirelessly with our handy RF transmitter.
Add 1/2″ Electric Drain Valve Kit Tooltip
This kit has everything you need to drain your tank from the push of a button from inside the cab!
Add 220 PSI Digital Air Pressure Gauge Tooltip
Using a tank mounted sensor wired directly to your gauge, our 220-PSI rated Digital Air Pressure Gauge delivers unparalleled accuracy with microprocessor stabilized readings.
Add Shocker XL 6 Horn Upgrade Tooltip
Upgrade your Shocker XL Train Horns to a 6 horn set up. With the 2 extra bells and new 6 way manifold, you can now get a little bit more out of the Shocker XL!
Add Shocker XL Train Horn Mount Tooltip
Already have a spot for your onboard air system, but not sure where to mount the horns? Take the guesswork out of installation with our Shocker horn mount.
Add Gold Level Extended Warranty See price in cart
Add Platinum Level Extended Warranty See price in cart

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 8OB2 fast-fill train horn kit, you get all the air you could ever need and then some. With 8 gallons of air being powered by dual Air Zenith OB2 air compressors, you never need to worry about not having enough air to get the job done again. With this kit, you can unleash a whopping 20 seconds of honk time that can be heard for miles! 

The 8OB2 kit was designed for use with our Shocker XL train horns to bring you the full power and tone of an actual locomotive. Our horns are constructed from an ultra-durable fiberglass-reinforced ABS composite and our diaphragms are made from stainless steel. We also stand behind them with a lifetime warranty against manufacturer defects. Our Conductor’s Special 8OB2 fast-fill train horn kit gives you one of the loudest, most reliable, and easy to install train horns you can buy.

The powerhouse that fills the massive 8-gallon, 8-port tank is a set of dual Air Zenith OB2 air compressors. This comes together to give you a system that's capable of blasting your Shocker XL train horn for 20 seconds and recovers your 8-gallon tank in a blazing 40 seconds! Let that sink in for a minute. Whether you want to alert distracted drivers or have plenty of air to fill up a flat, our Conductor’s Special 8OB2 fast-fill 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 8OB2 fast-fill train horn kit, you can also use the air supply to:

  • Adjust Tire Pressure
  • Heavy-duty pneumatic tool 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!

Please note: The 6 horn upgrade kit does NOT include the extension brackets to connect to our STDK bracket or Shocker XL horn mount.


    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!
    • Industrial Grade Stainless Steel Diaphragms
    • Extra Large Eight Gallon Air Tank
    • Heavy Duty Dual Air Zenith OB2 Black Air Compressors
    • All-inclusive Train Air Horn Solution!
    • All Standard Mounting Hardware
    • Max Honk Time: 10 to 14 Seconds
    • Lifetime Warranty on Horns
    • It can be heard from miles away!
    • Horn: HornBlasters Shocker 4 Train Horn Kit
    • Part Number: HK-S4-8OB2
    • Horn: Shocker 4 Train Horn Kit
    • Material: High-Impact 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)
    • Flare: 6.5″ (165.1 mm)
    • Weight: 4.5 lb (2.04 Kg)
    • Fitting Size: ⅛″ M NPT
    • Tank: HornAir 8 Gallon 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)
    • Compressor: Air Zenith OB2 Air Compressors
    • Voltage: 12 volts DC
    • Air Flow: 8.5 CFM at Free Flow
    • Max Amperage: 35 amps
    • Maximum Duty Cycle: 100% @ 200 PSI
    • Maximum Working Pressure: 200 PSI
    • Compressor Length: 13.0″ (330.2 mm)
    • Compressor Width: 6.0″ (152.4 mm)
    • Compressor Height: 7.50″ (190.5 mm)

    8-Gallon Air Tank Dimensional Drawing

    0 4.25
    10 4.25
    20 4.25
    30 4.25
    40 3.22
    50 3.13
    60 3.13
    70 2.95
    80 2.87
    90 2.66
    100 2.47
    110 2.36
    120 2.21
    130 2.08
    140 1.97
    150 1.83

    * 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
      Our Shocker XL Train Horns are backed by our Lifetime Manufacturer's Defect Warranty and the rest of the components in this kit are 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

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