Outlaw Train Horn Kit
HornBlasters · Outlaw

Outlaw Train Horn Kit

$499.99 $669.99 Save $170.00

Air System
Horn Finish
Kit it out (optional add-ons)
+$26.99
+$39.99
+$74.99
+$69.99
+$90.00
2-year warranty 30-day money back Everything included

Real train horn tone.

The Outlaw runs three wide-flare metal trumpets on a metal bracket, driven by onboard compressed air, for the deep tone you expect from a train horn. Pick the air system that fits your build and let every arrival be heard.

18.5″horn length
15.5″width
12.5″height

Big sound, honest hardware

Three real trumpets

Three wide-flare metal bells on a metal bracket, the classic round train horn shape. This is the deep, layered train horn tone people turn around for, not a tinny electronic imitation.

Onboard compressed air

Every kit ships with its own compressor and tank. It fills itself between honks, and the same air supply can top off tires or run small air tools.

One box, one weekend

Air line, wiring kit with fuses, fittings, mounting hardware, an air line cutter, instructions, and earplugs. The electric air valve comes pre-installed.

Hear the Outlaw

One recording of the Outlaw trumpets at full pressure. No editing.

Audio sampleOutlaw train horn
0:000:00

Phone speakers undersell it. Earplugs ship in the box for a reason.

Pick your air system

Same Outlaw trumpets on every kit. The air system decides how long you can honk, how much pressure you get, and how much extra air you have on tap.

Entry
Outlaw 127H light-duty air system with 1.5-gallon tank

Light-Duty (4-5 Seconds of Honk Time)

Best value, get loud fast
120PSI
4-5 shonk time
$579.99kit price

The 127H air source runs a 1.5-gallon 4-port tank and a 2L compressor at 120 PSI. It refills from 90 PSI in about 35 seconds and the same supply can air up tires. One of our top-selling entry-level kits.

Most popular
Outlaw 228H medium-duty single-manifold air system with 2-gallon tank

Medium-Duty (5-6 Seconds of Honk Time)

More pressure, longer honk
150PSI
5-6 shonk time
$669.99$499.99kit price

The 228H puts a 2-gallon tank and a weather-resilient compressor on a single manifold for a fast, tidy install. It runs 150 PSI for a longer 5 to 6 second honk and refills from 110 PSI in about 55 seconds.

Heavy-duty
Outlaw 232 heavy-duty air system with HornAir 2-gallon 6-port tank and 3Q compressor

Heavy-Duty (5-6 Seconds of Honk Time)

Heaviest-duty compressor, quietest fill
150PSI
5-6 shonk time
$859.99kit price

The HornAir 232 pairs a 2-gallon 6-port tank with our redesigned 3Q compressor: quieter, 100% duty at 100 PSI, and rated to 200 PSI. It adds a stainless liquid-filled gauge and the flexibility to split the compressor from the tank.

Two finishes, one horn

Chrome wants to be seen. Stealth Black disappears under the truck. Same trumpets, same roar.

Outlaw train horn in Chrome, horn only

Chrome

Outlaw train horn in Stealth Black, horn only

Stealth Black

Everything in the box

Each kit ships complete and ready to install. The horn is the same; the air system and its plumbing are what change.

Light-Duty (4-5 Seconds of Honk Time)

  • Outlaw train horn (Chrome or Stealth Black)
  • HornBlasters 127H air source unit (1.5-gallon tank)
  • Pre-installed 3/8″ electric air valve
  • 10 ft of 1/2″ D.O.T. air line
  • 22 ft of 10-gauge red, 18-gauge blue, and 18-gauge grey wire
  • Complete wiring kit with fuse holder and fuses
  • Mounting hardware and air line cutter
  • Detailed instructions and earplugs

Medium-Duty (5-6 Seconds of Honk Time)

  • Outlaw train horn (Chrome or Stealth Black)
  • 2-gallon air source unit, single manifold
  • 110/150 PSI pressure switch
  • Air filter relocation and spare air filters
  • Pre-installed 3/8″ electric air valve
  • Brass NPT fittings kit with safety blow-off and drain cock
  • 10 ft of 1/2″ air line and complete wiring kit with fuses
  • Mounting hardware, air line cutter, instructions, earplugs

Heavy-Duty (5-6 Seconds of Honk Time)

  • Outlaw train horn (Chrome or Stealth Black)
  • HornAir 2-gallon 6-port air tank
  • HornBlasters 3Q air compressor
  • 110/150 PSI pressure switch with 40 amp relay
  • 200 PSI stainless steel liquid-filled air gauge
  • Remote mountable intake filter and spare elements
  • 10 ft of 1/2″ line, 6 ft of 3/8″ intake line, wiring kit
  • Brass NPT fittings kit, mounting hardware, instructions, earplugs

Full specifications

Showing specs for your selection: Medium-Duty (5-6 Seconds of Honk Time) / Chrome

Light-Duty (4-5 Seconds of Honk Time)Part No. HK-C3-127H / HK-C3B-127H

Horn

HornOutlaw train horn
Dimensions18.5″ L × 15.5″ W × 12.5″ H
Weight15 lb (6.8 kg)
Air inletAccepts 1/2″ air line

Air source

UnitHornBlasters 127H air source
Air tank1.5-gallon (6.6 L), 4-port
Compressor2L, 18 A max, 25% duty @ 100 PSI
Operating pressure120 PSI
Restart pressure90 PSI
Unit size15.2″ × 5.9″ × 12.8″, 13.75 lb

Fill rate (13.8 V supply)

0 to 120 PSI2 min 10 sec (±10 sec)
90 to 120 PSI35 sec (±5 sec)
Medium-Duty (5-6 Seconds of Honk Time)Part No. HK-C3-228H / HK-C3B-228H

Horn

HornOutlaw train horn
Dimensions18.5″ L × 15.5″ W × 12.5″ H
Weight15 lb (6.8 kg)
Air inlet1/2″ air line

Air source

Unit2-gallon single-manifold air source
Pressure switch110 / 150 PSI
Operating pressure150 PSI
Restart pressure110 PSI
System max amp draw22 A
Unit size19″ × 6.25″ × 14.5″

Fill rate (13.8 V supply)

0 to 150 PSI3 min 5 sec (±10 sec)
110 to 150 PSI55 sec (±5 sec)
Heavy-Duty (5-6 Seconds of Honk Time)Part No. HK-C3-232 / HK-C3B-232

Horn

HornOutlaw train horn
Dimensions18.5″ L × 15.5″ W × 12.5″ H
Weight15 lb (6.8 kg)
Air inlet1/2″ air line

Air source

Air tankHornAir 2-gallon 6-port (17″ × 6″ dia × 8″, 10 lb)
Compressor3Q, 20 A max, 100% duty @ 100 PSI
Flow rate1.41 CFM @ 0 PSI
Operating pressure150 PSI (200 PSI max)
Restart pressure110 PSI
Gauge200 PSI stainless, liquid-filled

Fill rate (13.8 V supply)

0 to 150 PSI3 min 59 sec (±10 sec)
110 to 150 PSI1 min 33 sec (±5 sec)

All kits run on 12-volt DC and fit trucks, SUVs, boats, and RVs. On the 127H and 228H kits, detaching the compressor from the tank voids the warranty. Need a split compressor and tank layout? That is the 232 and higher models.

What owners say

Before you buy

How long can I hold the horn?
It depends on the air system. The 127H light-duty kit gives you 4 to 5 seconds of honk; the 228H medium-duty and 232 heavy-duty kits give you 5 to 6 seconds. Between honks the 127H refills in about 35 seconds, the 228H in about 55 seconds, and the 232 in about a minute and a half.
How loud is the Outlaw?
Third-party testing measured the Outlaw at 142.7 dB at 3 feet. The distance matters: horns advertised above 150 dB were measured right at the bell or never measured at all, which is why we state ours with the distance. It runs three real metal train horn trumpets on a compressed-air system from 120 to 150 PSI depending on the kit. Earplugs come in the box, and you will want them.
Which air system should I get?
The 127H is the best value and gets you loud fast. The 228H steps up to 150 PSI and a longer honk on a tidy single-manifold install. The 232 is the heavy-duty pick: it runs the same 2-gallon tank as the 228H, but with a more heavy-duty compressor that comes in handy when airing up tires or using small air tools, plus a quieter fill, a liquid-filled gauge, and the option to split the compressor from the tank.
Will it fit my vehicle?
The horn is the same on every kit: it needs a footprint of 18.5 inches by 15.5 inches and 12.5 inches of height. The air source space depends on the kit: the 127H unit is 15.2 inches by 5.9 inches by 12.8 inches, the 228H unit is 19 inches by 6.25 inches by 14.5 inches, and the 232 splits into a 17-inch tank and a 10.1-inch compressor you can mount separately. Every kit runs on 12-volt DC, so trucks, SUVs, boats, and RVs are all fair game.
Can I air up tires with it?
Yes. On every Outlaw kit the onboard air supply can top off tires and run small air tools, not just power the horns.
What is the warranty?
Every kit is backed by a 2-year manufacturer's defect warranty, plus our 30-day satisfaction replacement or refund guarantee. One caveat on the 127H and 228H: detaching the compressor from the tank voids the warranty. If you need a split compressor and tank layout, go with the 232.

Buy with confidence

Warranty

This product is backed by our 2-year manufacturer's defect warranty.

Satisfaction guarantee

We offer a 30-day satisfaction replacement or refund guarantee on all purchases, except where otherwise noted in the product listing.

Money-back / refund policy

Merchandise 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, and a 15% restocking fee may apply. Please report any order discrepancy within 7 days of the invoice date.

Physical damage policy

Physical damage to any product voids warranty coverage. This includes improper handling and any damage sustained by irregular usage.

Compressor and tank warranty note

On the 127H and 228H kits, detaching the compressor from the tank voids your warranty. If you need a solution where the compressor is detached from the tank, look at our 232 and higher models.

California Proposition 65 Warning

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.

Hearing protection recommended

These air horns are extremely loud. Wear hearing protection when testing at close range, never honk directly next to a person or inside an enclosed space, know your local regulations, and use the horns responsibly.

Announce every arrival.

The Outlaw Train Horn Kit ships complete with detailed instructions, and it is backed by a 2-year warranty and a 30-day money-back guarantee.