HornAir 232 Onboard Air System

Honking & Light Pnuematic Use


1 review

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 1/4″ 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 Tire Inflation Kit Tooltip
Our Tire Inflation Kit includes a 30' Coil Hose, Tire Inflation Gun, & Air Relocation Kit!
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 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 Gold Level Extended Warranty See price in cart
Add Platinum Level Extended Warranty See price in cart

Wanting to get onboard air but aren't sure where to start? Our HornAir 232 Onboard Air System is the go-to onboard air kit for many customers just getting started. Our HornAir 232 Onboard Air System is a complete 150 PSI kit that has everything you need to get onboard air for your ride.

Our HornAir 232 Onboard Air System comes 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. 

Included is our Black 2-Gallon 6 Port Air Tank, which has four 1/4" ports and two 1/2" ports. Strategic placement of the ports allows you 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 1/2” ports provide optimal airflow, preventing bottlenecking that occurs in other kits.

At the heart of our HornAir 232 Onboard Air System is Viair's flagship medium-duty quick-recharge air compressor, the Viair 325C. As a fast-fill compressor, the Viair 325C can recharge the HornAir 232 tank from 110 PSI to 150 PSI in just 1 minute and 10 seconds, all while pulling only 21 amps! Our HornAir 232 Onboard Air System is perfect for light pneumatic applications such as emergency tire inflation or load-leveling air springs. The separate tank and compressor unit is fully sealed and able to be mounted outside and exposed to the elements.

While our HornAir 232 Onboard Air System 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, and/or an Electric Drain Valve kit to get the most out of one of the best onboard kits on the market!


- Shocker S4 Train Horns (Part number: AH-S4)
- Outlaw Series Train Horns (Part numbers: AH-O3, AH-03B, AH-O5)

     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 1.59 14 0 45.0 14
    10 1.40 16 1.0 37.6 16
    20 1.24 16 2.0 34.1 18
    30 1.20 18 3.0 32.3 18
    40 1.17 18 4.0 29.1 20
    50 1.08 19 5.0 26.0 21
    60 1.01 20 6.0 23.7 21
    70 0.93 21 7.0 21.5 21
    80 0.87 21 8.0 19.7 21
    90 0.82 21 9.0 18.0 21
    100 0.77 21 10.0 16.5 21
    110 0.72 21
    120 0.68 21
    130 0.64 21
    140 0.60 21
    150 0.57 21

    * Supply Voltage: 13.8 Volts

    0 to 105 PSI 2 min. 35 sec. (± 10 sec.)
    85 to 105 PSI 40 sec. (± 05 sec.)
    0 to 145 PSI 4 min. 15 sec. (± 10 sec.)
    110 to 145 PSI 1 min. 25 sec. (± 05 sec.)

    * Supply Voltage: 13.8 Volts

    • Designed For HornBlasters Shocker Horns
    • All-inclusive Train Horn Air Solution!
    • Fast Filling 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: 2 Gallon Tank
    • Length: 17" (431.8 mm)
    • Diameter: 6" (152.4 mm)
    • Height: 7" (177.8 mm)
    • Weight: 10 lb (4.54 Kg)
    • Compressor: Viair 325C Air Compressor
    • Voltage: 12 volts DC
    • Air Flow: 1.77 CFM at Free Flow
    • Average Fill Time: 1 Min 10 Sec
    • Max Amperage: 19 amps
    • Maximum Duty Cycle: 33% @ 100 PSI
    • Maximum Working Pressure: 150 PSI
    • Compressor Length: 8.0" (203.2 mm)
    • Compressor Width: 4.0" (101.6 mm)
    • Compressor Height: 7.05" (179.07 mm)
    • Compressor Weight: 6.95 lb (3.15 Kg)
    • Pressure Switch: Weatherproof 110/150 PSI Switch
    • Voltage: 12 volts DC
    • Max Amps: 40A
    • Stop Pressure: 150 PSI
    • Restart Pressure 110 PSI
    • 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.

    Customer Reviews

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    Filter Reviews:
    Rich B.
    United States United States

    Beyond expectations

    Installation was so straightforward you can’t make a mistake. The only thing that takes time is being fussy how are you want the presentation. When I finally got away from the house and blew the horn on the highway it was so sweet, such a wonderful tone, and of course.....SUPER LOUD!! This set up is something to be proud of for sure.

    HornBlasters HornAir 232 Onboard Air System ReviewHornBlasters HornAir 232 Onboard Air System ReviewHornBlasters HornAir 232 Onboard Air System Review