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Outlaw 127H Train Horn Kit


59 reviews

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One of our most popular entry-level train horn kits, our Outlaw 127H train horn kit is easy to install and packs heaps of power at a budget-friendly price. If you are wanting that authentic train horn sound for an affordable cost, this is the perfect kit for you.

As one of the loudest train horns we carry, our Outlaw train horn packs a lot more punch than its size would lead you to believe. With an install footprint much smaller than other train horns, our Outlaw train horn is a great alternative to larger train horns when space is limited without losing volume.

Our HornAir 127H air source unit that we bundled with our Outlaw train horn is the ideal air source unit for tight install requirements or tight budgets. As our smallest air source unit, our HornAir 127H unit can easily fit in the trunk of a car or a toolbox. As a non-enclosed unit, we highly recommend keeping the unit in a space that is dry and free of debris. While our Outlaw 127H train horn kit might seem small, you still get a stunning 5 seconds of continuous blast time out of the 1.5-gallon air tank and a lightning-fast recharge time of 90-120 PSI in only 35 seconds! Like all HornBlasters horn kits, the Outlaw 127H train horn kit is a complete kit with all required components and detailed instructions included.

While this HornBlasters Outlaw 127H train horn kit gives you everything you need to get up and going, make sure to pick up our wireless remote to get the most out of this kit.

  • Heavy-duty black finish
  • 120 PSI Air System
  • All-inclusive train horn kit
  • Max honk time: 3 to 5 seconds

(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. **

Product Comparison
Honk Time 3-5 Seconds 4-6 Seconds 4-6 Seconds
Recharge Time 35-Seconds 75-Seconds 65-Seconds
Tank Size 1.5-gallon 2-Gallon 2-Gallon
Air Pressure 120 PSI 150 PSI 150 PSI
Onboard Air
(Ability to use small air tools & fill tires)
Weather Resistant
  • Part Number: HK-C3B-127H
  • Operating Pressure: 120 PSI
  • Restart Pressure: 90 PSI
  • Voltage: 12-Volt DC
  • Horn: Outlaw black train horn
  • Horn Length: 18.5″ (469.9 mm)
  • Horn Width: 15.5″ (393.7 mm)
  • Horn Height: 12.5″ (317.5 mm)
  • Horn Weight: 15 lb (6.8 Kg)
  • Horn Air Inlet Fitting: 1/2" air line
  • Air Source Unit: HornBlasters 127H air source unit
  • Air Source Length: 15.2″ (386.08 mm)
  • Air Source Width: 5.9″ (149.86 mm)
  • Air Source Height: 12.8″ (325.12 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 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 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!
  • 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

4.9 Based on 59 Reviews
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Filter Reviews:
Jonathan C.
United States United States

Absolutely stunning

The staff at hornblasters is amazing and the product is just Wow. These train horns far exceeded my expectations! I highly recommend these especially if you’re on a budget.

HornBlasters Outlaw 127H Train Horn Kit ReviewHornBlasters Outlaw 127H Train Horn Kit ReviewHornBlasters Outlaw 127H Train Horn Kit Review
Larry B.
United States United States


Love it. Very loud.

Michael A.
United States United States


A beautiful installation on my new 21 F250

United States United States

I like it

fun fun fun fun fun loud!!!!!

Daniel H.
United States United States


My buddy has the bandit set up so I bought the outlaw and I thought it was going to be louder. It sounds just like the bandit I wish I wouldn’t have spent the extra money and just bought the bandit Instead. Aside from that the installation was simple and everything arrived quick