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Bullet 127H Air Horn Kit

(Non-Weather Sealed Air Supply)


8 reviews

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Looking for a ridiculously loud air horn for your car, but want something higher-pitched than a train horn? Give our Bullet 127H air horn kit a shot! With this kit, you get one of the loudest air horns kits you can buy in a compact package that goes easy on your wallet. Our Bullet 127H makes the perfect beginners kit, with most of the kit pre-wired and pre-plumbed which makes for fast and easy installation

They say that big things sometimes come in small packages and this is especially true for our Bullet 127H air horn kit. While this metal quad-bell horn might have an incredibly small install footprint, the tremendous sound this horn produces is even louder than some train horns we carry! Our Bullet air horn comes with the required 1/4" air valve already pre-installed so you are back out on the road and honking in no time at all! 

Much like our Bullet air horn, our 127H air source unit that it's paired with packs a lot of punch in a small package. With one of the smallest installation footprints out of all of our complete kits, our Bullet 127H is perfect for installs where space is limited. The 1.5-gallon air tank for the unit can supply your Bullet air horn with enough air for 4 seconds of continuous blast-time and the swift Viair 275C air compressor will recharge the tank from 90-120 PSI in only 35 seconds!  

As with all HornBlasters horn kits, our Bullet 127H air horn kit comes complete with all required components and detailed instructions.

  • High performance
  • Beautiful chrome finish
  • All-inclusive air horn solution!
  • Complete with pre-installed air valve & fittings

(Note: Tank mounted air compressors are not fully sealed. For this reason, the manufacturer recommends the tank/compressor system be mounted in the upright position in an enclosed space away from moisture, dirt, debris, etc... Failure to mount this product as directed will void the warranty)

**Detaching the compressor from the tank will void your warranty on this kit. If you need a solution where the compressor is detached, please look at our 232 and higher models. **

  • Part Number: HK-B4-127H
  • Operating Pressure: 150 PSI
  • Restart Pressure: 110 PSI
  • Voltage: 12-Volt DC
  • Horn Air Inlet: 1/2" air line
  • Horn Length: 11.15″ (283.21 mm)
  • Horn Width: 5.70″ (144.78 mm)
  • Horn Height: 6.00″ (152.4 mm)
  • Horn Weight: 5 lb (2.27 Kg)
  • Air Source Unit: HornBlasters 127H air source unit
  • Working Pressure: 120 PSI
  • Air Source Length: 15.0″ (381 mm)
  • Air Source Width: 6.0″ (152.4 mm)
  • Air Source Height: 13.0″ (330.2 mm)
  • Air Source Weight: 13.75 lb (6.24 Kg)
  • Air Tank: 1.5-gallon 4 port air tank
  • Volume: 1.5 Gal (6.6 L)
  • Air Compressor: 275C air compressor
  • Max Amperage: 18 amps
  • Maximum Duty Cycle: 25% @ 100 PSI
0 2.03 10 0 57.5 10
10 1.17 12 1.0 32.0 13
20 1.11 13 2.0 30.0 14
30 1.04 15 3.0 28.5 16
40 1.01 15 4.0 26.5 16
50 0.97 16 5.0 24.5 17
60 0.92 16 6.0 22.5 17
70 0.88 17 7.0 21.5 18
80 0.83 17 8.0 20.0 18
90 0.79 17 9.0 18.5 18
100 0.76 18 10 17.0 17
110 0.72 18
120 0.67 18

* Supply Voltage: 13.8 Volts

0 to 120 PSI 2 min. 10 sec. (±10 Sec.)
90 to 120 PSI 35 sec. (± 5 Sec.)

* Supply Voltage: 13.8 Volts

  • 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 product's 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 of any order discrepancy within 7 days from the invoice date so that we may investigate and resolve the situation accordingly.
  • Warranty
    This Kit is backed with a 1 Year Manufactures Defect Warranty!
  • Satisfaction Guarantee offers our customers a 30-day satisfaction replacement or refund guarantee on all purchases, except when otherwise noted in the product listing.
  • Cross-Shipments will not cross-ship returned merchandise.
  • Physical Damage Policy
    Physical damage to any product purchased at 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

Hearing Loss warning icon
Hearing Protection Required

This product produces extreme loudness. Proper hearing protection must be worn at all times during its operation. Hearing loss or permanent damage may result from unsafe use. Use this product in a safe and responsible manner and at a distance of at least 100 meters from others. Never operate this product in a closed environment, in close proximity to living beings, or where prohibited by law.

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

Customer Reviews

5.0 Based on 8 Reviews
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Filter Reviews:
George U.
United States United States

Fun Fun Fun many laughs

perfect I love it

Kevin A.
United States United States

Fast service, great company..easy install,simple instructions. Highly recommend

jose c.
United States United States


This thing is so fun to use. It’s louder than what I expected and I love it. I’ve been messing with people ever since I installed it.


Bullet 127H air horn kit

I put the horns on the truck and they are very load and people do not like me. I highly recommend The horns for anyone that wants to scare people.


My 5th new Hornblasters Air Horn System

AWESOME systems! I've purchased 5 new vehicles since 2011- each time I had a Hornblasters system installed...Can't live without it!!!

HornBlasters Bullet 127H Air Horn Kit ReviewHornBlasters Bullet 127H Air Horn Kit Review