HornAir 2OB2 Fast-Fill Onboard Air System

Fast Recovery & Moderate Pnuematic Use


Suggested Addons
Add Tire Inflation Kit Tooltip
Our Tire Inflation Kit includes a 30' Coil Hose, Tire Inflation Gun, Air Relocation Kit, Blow Gun, & a complete Air Accessory Fitting 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 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 2OB2 brings you a complete 150 PSI onboard air system with the fastest filling compressor in its class

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

Powering our HornAir 2OB2 is Air Zenith's speed demon of a compressor, the Air Zenith OB2. As one of the fastest compressors in its class, the Air Zenith OB2 can fill our 2-gallon tank in as fast as 35 seconds while only pulling 35 amps!

The HornAir 2OB2 is great for 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 2OB2 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.

    • Designed for HornBlasters Shocker horns
    • All-inclusive train horn air solution!
    • Top-end 150 PSI compressor perfect for train horns
    • Comes with a standard 1/2" push-to-pull fitting
    • Complete fitting kit
    • All standard mounting hardware
    • Part Number: HA-2OB2
    • Operating Pressure: 150 PSI
    • Restart Pressure: 110 PSI
    • Voltage: 12-Volt DC
    • 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
    • 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
    • Compressor Length: 13.0″ (330.2 mm)
    • Compressor Width: 6.0″ (152.4 mm)
    • Compressor Height: 7.50″ (190.5 mm)

    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.