HornAir 240 Onboard Air System

Honking & Fastest Recovery


Suggested Addons
Add Viair Air Compressor Bracket Tooltip
The Viair Air Compressor Bracket will allow you to mount your compressor upright and is compatible with Viair Compressor models 275C-485C.
Add Tire Inflation Kit Tooltip
Our Tire Inflation Kit includes a 30' Coil Hose, Tire Inflation Gun, & Air Relocation Kit!
Add 220 PSI Digital 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 Cooling Fan Isolator Kit Tooltip
Isolate your Compressor, drastically cutting down on vibration, allowing your compressor to run quieter & cooler, & extending the duty cycle up you 25%!
Add 400C Dual Air Compressor Upgrade Tooltip
Double your performance with the 400C Dual Compressor upgrade. Recharge your tank faster and honk more often.
Add Gold Extended Warranty Tooltip
1 year add-on to existing warranty. Does NOT cover accidental damage, no advanced replacement.
Click here for more information!
+See price at checkout
Add Platinum Extended Warranty Tooltip
2 year add-on to existing warranty. DOES cover accidental damage and advance replacement.
Click here for more information!
+See price at checkout

Designed for anyone that wants their air and wants it now, the HornAir 240 brings you a complete 150 PSI onboard air system with the fastest filling compressor in its class. A staple in many of our train horn kits, the HornAir 240 is perfect for horns or emergency air inflation applications where you need a fast refill rate.  

Included is our Black 2-gallon air tank that has four 1⁄4 in ports and two 1⁄2 in ports. Strategic placement of the ports allows you to be able to install your drain cock on the bottom-most port on the tank for optimal draining no matter how the air tank is oriented. The ½ inch ports provide optimal airflow, preventing bottlenecking that occurs in other kits.

Powering our HornAir 240 is Viair’s speed demon of a compressor, the Viair 400C air compressor. As one of the fastest air compressors in its class, the Viair 400C can fill our 2-gallon tank in as fast as 45 seconds while only pulling 28 amps!

The HornAir 240 is great for light pneumatic applications such as emergency tire inflation or load-leveling air springs and makes a perfect match with many of our train horns. With such a fast-fill time, it means being able to blast your horns more often in quicker succession! With it being a separate tank and compressor unit it is fully sealed and able to be mounted outside exposed to the elements.

While the Horn Air 240 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!

Our HornAir systems come complete with all necessary fittings, including a Viair 110/150 Pressure Switch with a built-in relay, safety blow-off, air gauge, and drain cock. Unlike many other onboard air systems, ours comes with 10 and 18 gauge wire, as well as a complete wiring kit including a fuse holder. This takes out the guesswork and helps ensure your system is installed correctly. All of our kits are also backed by a year manufacturer's warranty as well as lifetime tech support!

     Please Note: This HornAir system is not recommended for AirChime horns. We recommend using at least a 4-gallon tank with larger-scale train horns like the P3, P5, K3, and K5; however, this kit is perfect for HornBlasters Shocker horns and Outlaw and Bandit series horns.

    0 2.62 16 0 74.0 16
    10 2.39 18 1.0 65.0 20
    20 2.21 20 2.0 60.0 23
    30 2.11 22 3.0 56.0 25
    40 2.01 24 4.0 53.0 27
    50 1.93 25 5.0 49.0 28
    60 1.84 26 6.0 46.0 28
    70 1.73 27 7.0 42.0 28
    80 1.65 27 8.0 38.0 28
    90 1.52 27 9.0 35.0 27
    100 1.45 27 10.0 31.0 27
    110 1.35 27
    120 1.26 27
    130 1.19 27
    140 1.08 27
    150 1.01 26

    * Supply Voltage: 13.8 Volts

    0 to 105 PSI 1 min. 17 sec. (± 05 sec.)
    85 to 105 PSI 19 sec. (± 03 sec.)
    0 to 145 PSI 2 min. 10 sec. (± 05 sec.)
    110 to 145 PSI 45 sec. (± 03 sec.)

    * Supply Voltage: 13.8 Volts

    • Designed for HornBlasters Shocker horns
    • All-inclusive onboard air solution!
    • Top-end 150 PSI compressor perfect for train horns
    • Comes with a standard 1/2" push-to-pull fitting
    • Complete fitting kit with safety valve & drain cock
    • All standard mounting hardware
    • Air Tank: 2-gallon 6 port air tank
    • Tank Length: 17" (431.8 mm)
    • Tank Diameter: 6" (152.4 mm)
    • Tank Height: 7" (177.8 mm)
    • Tank Weight: 10 lb (4.54 Kg)
    • Tank Ports: x2 1/2" NPT, x4 1/4" NPT
    • Operating Pressure: 150 PSI
    • Air Compressor: Viair 400C air compressor
    • Voltage: 12 volts DC
    • Air Flow: 2.54 CFM at Free Flow
    • Average Fill Time: 42 Sec
    • Max Amperage: 26 amps
    • Maximum Duty Cycle: 33% @ 100 PSI
    • Maximum Working Pressure: 150 PSI
    • Compressor Length: 9.0" (228.6 mm)
    • Compressor Width: 4.0" (101.6 mm)
    • Compressor Height: 7.00" (177.8 mm)
    • Compressor Weight: 8.00 lb (3.63 Kg)
    • Pressure Switch: Weatherproof 110/150 PSI Switch
    • Stop Pressure: 150 PSI
    • Restart Pressure: 110 PSI

    2-Gallon Air Tank Dimensional Drawing

    • 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

    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.