HornAir 8OB2 Onboard Air System

Honking & Heavy Duty Pneumatic Use


Add 1/2″ Electric Drain Valve Kit
This kit has everything you need to drain your tank from the push of a button from inside the cab!
Add Tire Inflation Kit
Our Tire Inflation Kit includes a 30' Coil Hose, Tire Inflation Gun, & Air Relocation Kit!
Add 220 PSI Digital Air Pressure Gauge
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.


The HornAir 8OB2 fast-fill onboard air kit is not to be underestimated. With an 8 gallon HornAir air tank, you never need to worry about not having enough air to get the job done again. This air system is more than enough to run air tools or for any heavy-duty pneumatic use as well as using horns.

The powerhouse that fills the massive 8-gallon, 8-port tank is a set of dual Air Zenith OB2 air compressors. This comes together to give you a system that's capable of recovering your 8 gallon tank in a blazing 40 seconds

This package is perfect for load-leveling air springs or air suspension. Also perfect for airing up tires or any other pneumatic use. Please note that if you use horns, you will still need an air valve kit to connect the system properly. 

Unlike some other air systems, HornAir onboard air systems come with a complete wiring kit including a fuse holder. This takes out the guesswork on your end and helps ensure your system is installed correctly. Another great feature of HornAir systems is that they come with a standard 1/2in OD push-to-pull fitting. This means the horns you hook up will get all the air they need.

An increasing number of people are using this for more than just blasting horns! With a system like the 8OB2, you can also use the air supply to:

  • Adjust tire pressure
  • Heavy duty pneumatic tool use
  • Inflate water toys and safety gear
  • Supply air to load leveling bags
  • Supply air for differential lockers
  • Blow up kids toys
  • Supply air to air suspension
  • And lots more!


Shocker S4 train horns (part number: AH-S4)
- Outlaw train horns (part number AH-C3B) 
Nathan Airchime series train horns (part number: AH-P3, AH-P5, AH-K3, AH-K5)

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

  • Designed for extreme train horns
  • All-inclusive train horn air solution!
  • Top-end 150 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 8 gallon tank
  • Tank Length: 32.5″ (825.5 mm)
  • Tank Diameter: 10.5″ (241.3 mm)
  • Tank Height: 12.5″ (317.5 mm) (With Legs)
  • Tank Weight: 20 lb (9.07 Kg)
  • Compressor: Air Zenith OB2 air compressors
  • Voltage: 12 volts DC
  • Air Flow: 8.5 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)
  • 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.