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⚠ This is a DIY build kit — YOU assemble it

You are buying a DIY kit of components, not a ready-to-use train horn. You will need to disassemble an impact drill and put it together yourself — expect 1–2 hours the first time you build one. Battery and charger are sold separately.

DIY Train Horn Gun Kit with 4 Trumpets for DeWalt - up to 150db - BossHorn
DIY Train Horn Gun Kit with 4 Trumpets for DeWalt - up to 150db - BossHorn
DIY Impact Train Horn Kit with 4 Trumpets for DeWalt or other Brushless Drills - up to 150db - BossHorn
DIY Impact Train Horn Kit with 4 Trumpets for DeWalt or other Brushless Drills - up to 150db - BossHorn
DIY Train Horn Kit for DeWalt® 20v Battery - BossHorn
DIY Kit

DIY Train Horn Kit for DeWalt® 20v Battery

All components included to build your own cordless train horn from a compatible impact drill. Step-by-step guide below.

$160.00
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Full Build Guide & What's Included

DIY Train Horn Gun Kit with 4 Trumpets for DeWalt® – Up to 140 dB

Build your own 140 dB cordless train horn with this complete DIY kit for DeWalt® drills. Featuring quad trumpets, a built-in compressor, and a remote control system, this kit gives you everything needed to turn your impact drill into a powerful, attention-grabbing horn. Perfect for events, safety alerts, outdoor adventures, or just having fun.

Key Features

  • Compatible with DeWalt® Drills – Works with most DeWalt® impact drill models, plus many other brushless drills.
  • 140 dB Loudness – Creates an incredibly powerful blast, louder than most vehicle horns.
  • Quad Trumpets – Delivers a bold, authentic train horn sound.
  • Wireless Remote Control – Operate your horn from a distance with ease.
  • Extreme Trumpets Upgrade – Optional upgrade available for even more sound power.

What’s Included in the Kit

  • Air horns assembly (4 trumpets)
  • Air compressor
  • Pre-built harness with remote receiver
  • Remote control
  • Air pipe
  • 2 mounting screws

How to Build Your Train Horn for DeWalt® 20v Battery

  1. Open the drill shell and remove gears, motor, and harness.
  2. Fit the shell to match the air compressor.
  3. Install the new harness and connect the compressor to terminals.
  4. Attach your DeWalt® battery and test the compressor.
  5. Reassemble the shell and drill two mounting holes.
  6. Install the horn mount with bolts and connect the air hose.
  7. Enjoy your powerful new train horn!

Why Choose This DIY Kit?

Unlike cheap alternatives, this kit is engineered for power, durability, and compatibility. It comes with everything you need to build a high-performance cordless horn from your DeWalt® impact drill—no extra tools or complicated wiring required. Just follow the steps and enjoy instant results.

Order your DIY Train Horn for DeWalt® 20v Battery Kit today and create a 140 dB blast that everyone will hear.

What You Also Need to Build It

These DO NOT come in the DIY kit. You'll need a compatible impact drill (to harvest the shell, gears, motor) and a battery + charger. Many customers already have these — if not, pick up what you need below.

Not into DIY?

Get a fully assembled BossHorn — ready out of the box

We build them for you. Same 140dB–150dB output, tested and guaranteed. Just snap in your battery and blast.

Shop Ready-Built HornsLoudest Horns (150dB)