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HornBlasters Mini Outlaw 3-Liter Train Horn Kit - Compact 120 PSI Air System - Easy Installation - Loud Multi-Tone Sound - 12 Volt Train Horn Kit for Trucks (HK-MC3B-M3)

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$279.99

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About this item

🚨 Compact Yet Mighty: The Mini Outlaw packs the power of larger systems into a compact design, delivering a booming multi-tone blast at 120 PSI. It’s small enough to fit in tight spaces, making it ideal for vehicles with limited installation areas.
⏱️ Quick Recovery Performance: Equipped with a high-quality air compressor, the system refills in roughly 35 seconds, allowing for back-to-back honks without delay. Perfect for demanding situations where you need consistent sound delivery.
🛠️ All-in-One Installation Kit: This kit comes fully equipped with a pre-wired and pre-plumbed air source unit, a 3-liter air tank, pressure switch, tank-mounted air gauge, airline, complete wiring kit with 40A relay, and all the mounting hardware you need for a simple, hassle-free install.
🚗 Universal Vehicle Compatibility: Designed to fit a wide range of vehicles, including cars, trucks, SUVs, and motorcycles. Its compact design allows it to seamlessly integrate into your vehicle, even in tight spaces.
🎵 Attention-Grabbing Multi-Tone Sound: Produces a bold, authentic train horn sound that gets you noticed and adds an aggressive tone to your vehicle’s personality. Whether it’s alerting distracted drivers, warning animals on the road, or ensuring safety in emergencies, this horn delivers every time.
🔧 Durable and Dependable: Built with high-quality materials to provide reliable performance in all conditions. Engineered for longevity, this system is perfect for daily use or when you need it most in critical situations.
🌟 Enhanced Safety Benefits: More than just a horn, this kit is a vital safety tool. Use it to alert other drivers, signal in low-visibility conditions, or ensure your presence is known in heavy traffic or on backroads.

Product Description

3-Liter Air Source Kit

This compact air system is perfect for your car/SUV/truck. This unit is only 16.5" long and 5" wide. This can be installed in your toolbox, truck bed (if covered), trunk, or in a storage compartment.

*This air source is not weather resistant, do not mount outside or upside down!

Included Pressure Switch and Gauge

This air source operates at 110PSI. The included pressure switch turns the compressor on and off as needed. You don't have to do this manually. The air gauge on the tank allows you to monitor the pressure within the system if desired.

Complete Wiring Kit

A complete wiring kit is included with this horn kit. You will receive a push button, toggle switch, 10-gauge wire, two rolls of 18-gauge wire, and all of the crimp connectors / fuses needed to install the kit from scratch. All you need is a wire stripper/cutter, and crimp tool.

Stainless Steel Internals

The Mini Outlaw is crafted with stainless steel diaphragms. This means that you can get the horns wet all year long without worrying about rust.

Compact All In One Air Source

Pre-installed Pressure Switch and Gauge

Complete All-in-One Wiring Kit

Durability you can trust

"Mini" Design for Easy Install

Other train horns on the market are designed to take up a lot of space underneath your vehicle. The Mini Outlaw is designed to save room without hanging down too low underneath your truck.

All of the necessary hardware you need to mount the horn to your vehicle is included.

True Train Horn Sound

The Mini Outlaw stands out with three small, but big sounding chimes.

Each chime produces a different pitch and when all 3 sound off at once, it creates the train horn sound we all know and love.

Pre-Installed Solenoid Valve

This horn features a pre-installed solenoid valve, ready to accept the 1/4" line we supply with the horn.

Mini Outlaw Specifications

Inlet Port Thread	1/4" BSPT
Inlet Tube Size	1/4" OD
Maximum Pressure	150 PSI
Minimum Pressure	50-60 PSI
Diaphragm Type	Stainless Steel
Voltage	12 & 24v Compatible
Dimensions	Horn Length: 16.5" (419.1mm) Horn Width: 14.5" (368.3mm) Horn Height: 11" (279.4mm)

3-Liter Air Source Specifications

Voltage	12v Only
Outlet Port	1/4" OD Tube
Pressure Switch On/Off Range	80 PSI ON, 110 PSI OFF
Weather Resistant?	No! Must be mounted UPRIGHT, in an ENCLOSED area!
Max Amp Draw @ 12VDC	18 Amps

Gunner

Reviewed in the United States on March 19, 2025

It honestly has that deep train horn sound, and is extremely loud. Even though I had to send my kit back, due to an unidentified slow leak in the tank the customer service and refund process was so hassle free it still deserves a 5 star. I’m just going to turn around and buy the same kit.

Patti Bisgard

Reviewed in the United States on April 2, 2025

Easy to install - plenty of everything necessary for installation. Just warn your neighbors - it is LOUD! My husband loves it!

CutRedWire

Reviewed in the United States on March 20, 2023

Everything in the kit is high quality. Even thought it says "mini" the horns are larger than I anticipated which is my fault. Other people say this on website reviews so pay attention to this. The horn is very loud and sound like the sample on their website. The installation kit is very comprehensive; everything you could possibly need to hook the horns up several different ways is included. In this kit the compressor is the type that cannot get wet so keep that in mind. More expensive compressors can get wet. Fortunately the compressor is small and fit nicely behind the rear set of my truck. Very happy with the purchase.

John king

Reviewed in the United States on April 7, 2023

Good packaging exactly what it says it is

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