(BYO) HornAir 548 Onboard Air System

$ 459.99

Overview When it comes to many onboard air applications, you want a system that you can depend on to have the air you need it. Whether you are on the side of the road with a flat or relying on it to keep your airbags full, the Horn Air 548 is a constant duty onboard air system that you never...

Tire Inflation Kit
Electric Drain Valve Kit


When it comes to many onboard air applications, you want a system that you can depend on to have the air you need it. Whether you are on the side of the road with a flat or relying on it to keep your airbags full, the Horn Air 548 is a constant duty onboard air system that you never have to worry about. With 5 gallons of air at your disposal and the unwavering performance of the Viair 480C, you can hit the road knowing that you will always have air when you need it.

The backbone of the Horn Air 548 is our 5 Gallon Black 8 Port Air Tank, with seven 1/2" ports and one 3/4" port. The ports are strategically placed for you to be able to install your drain cock on the bottom-most port on the tank for optimal draining no matter how the tank is oriented. The 1/2" ports provide the optimal airflow, preventing bottlenecking that occurs in other kits.

The Viair 480C that comes in our Horn Air 548 is a constant duty compressor that was built to handle a heavy workload. With a 100% duty cycle at 100 PSI and a recharge time from 110-150 PSI of only 40-50 seconds, the Horn Air 548 allows you to run the system for prolonged periods and ensures you never have to wait too long to use it.

An increasing number of people are using this for more than just blasting horns! With a system like the Horn Air 548, you can also use the air supply to:

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

While the Horn Air 548 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 Activation Remote, Tire Inflation Kit, or an Electric Drain Valve kit to get the most out of one of the best onboard air kits you can buy!

Our HornAir systems come complete with all necessary fittings, including a Viair 110/150 PSI 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 defect warranty as well as lifetime tech support!


Shocker S4 Train Horns (Part number: AH-S4)
Nathan Airchime Series Train Horns (Part Number: AH-P3, AH-P5, AH-K3, AH-K5)


Performance Data / Fill Rates
0 1.86 10 0 52.7 10
10 1.75 12 1.0 47.5 13
20 1.59 14 2.0 43.2 15
30 1.52 15 3.0 40.7 16
40 1.45 16 4.0 38.1 18
50 1.41 17 5.0 35.3 18
60 1.33 18 6.0 32.6 19
70 1.26 18 7.0 30.0 20
80 1.20 19 8.0 27.0 22
90 1.13 19 9.0 25.0 22
100 1.07 20 10.0 22.3 21
110 0.99 21 11.0 20.1 21
120 0.93 23 12.0 18.3 21
130 0.88 22 13.0 16.0 20
140 0.82 22 14.0 14.0 19
150 0.75 21
160 0.71 21
170 0.67 21
180 0.61 21
190 0.55 20
200 0.51 19

* Supply Voltage: 13.8 Volts

0 to 145 PSI 6 min. 02 sec. (± 10 sec.)
110 to 145 PSI 1 min. 55 sec. (± 05 sec.)

* Supply Voltage: 13.8 Volts

  • Designed For Extreme Train Horns
  • All-inclusive Train Horn Air Solution!
  • Top-End 200 PSI Compressor Perfect For Train Horns
  • Comes With Standard 1/2" Push-to-Pull Fitting
  • Complete Fitting Kit With Safety Valve & Drain Cock
  • All Standard Mounting Hardware
    • 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: Viair 480C Air Compressor
    • Average Fill Time: 1 Min 30 Sec
    • Voltage: 12 volts DC
    • Air Flow: 1.76 CFM at Free Flow
    • Max Amperage: 23 amps
    • Maximum Duty Cycle: 100% @ 100 PSI
    • Maximum Working Pressure: 200 PSI
    • Compressor Length: 10.87″ (276.09 mm)
    • Compressor Width: 4.0″ (106.68 mm)
    • Compressor Height: 6.75″ (171.45 mm)
    Diagrams / Manuals
    Refunds, Returns, & Warranty
  • 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.


    Use this product in a safe and responsible manner, at a distance of at least 100 feet from others.

    Proper hearing protection must be worn when using this air horn. Hearing loss or permanent damage may result from unsafe use.

    Never operate this product in a closed environment or close to pedestrians or others.

    It is the consumer's responsibility to comply with local noise ordinances and D.O.T. sound level laws.


    This product can expose you to chemicals including lead, which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.


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