Conductor's Special 5OB2 Fast-Fill Train Horn Kit

(Insane Filling Speed & Constant Duty)


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!


Designed for the person that loves to blow their horn for an outrageous amount of time, our Conductor’s Special fast-fill 5OB2 train horn kit gives you all the air you would ever need to blast your heart out! It's also one of the fastest recharging kits we sell. Want to have the ability to blast your train horn for 10-12 seconds straight? This is the kit for you!

The 5OB2 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 5OB2 train horn kit gives you one of the loudest, most reliable, and easy to install train horns you can buy.

Taking center stage in this kit is our HornAir 5OB2 Onboard Air system. Our 5-gallon 8-port air tank gives you enough air to honk for as long as 12 seconds! That's also enough capacity to give you plenty of onboard air in case of a road emergency that requires you to inflate a tire or to use for air tools for example. Our Conductor’s Special 5OB2 fast-fill train horn kit features one the fastest compressors available, the Air Zenith OB2. Ensuring you always have air when you need it, our Conductor’s Special 5OB2 fast-fill train horn kit can recharge all 5 gallons in as little as a minute and a half!

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 budget "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 five-gallon air tank
  • Heavy-duty Air Zenith OB2 air compressor
  • All-inclusive train air horn solution!
  • All standard mounting hardware
  • Max honk time: 10 to 12 seconds
  • It can be heard from miles away!
  • Horn: HornBlasters Shocker 4 train horn kit
  • Part Number: HK-S4-5OB2
  • 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: 5″ (127 mm)
  • Weight: 4.5 lb (2.04 Kg)
  • Fitting Size: ⅛″ M NPT
  • Tank: HornAir 5 gallon tank
  • Tank Length: 20.5″ (520.7 mm)
  • Tank Diameter: 9.5″ (241.3 mm)
  • Tank Height: 11.5″ (292.1 mm) (with legs)
  • Tank Weight: 20 lb (9.07 Kg)
  • Compressor: Air Zenith OB2 air compressor
  • Average Fill Time: 1 Min 10 sec
  • Voltage: 12 volts DC
  • Air Flow: 4.25 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)

5-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

0 to 150 PSI 3 min. 30 sec. (± 10 sec.)
110 to 150 PSI 70 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
    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 a 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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