About Us

HonkUp is a small, California-based team of builders, engineers, and sound enthusiasts dedicated to creating custom, high-performance train air horns.
We focus on craftsmanship, safety, transparency, and the kind of quality that only hand-built work can deliver.

Every horn we make is designed with attention to detail, durability, and power — built not for mass production, but for people who want something unique, bold, and reliable.

What We Make

We specialize in custom-built train air horns crafted from brand-new power tools made by well-known tool manufacturers such as DeWalt, Milwaukee, Makita, Ryobi, Bosch, and others.

We use the tool housing and components as the base, then integrate precision metal trumpets and internal parts to create a powerful, instant-activation air horn.

Important Transparency

  • We are not an official manufacturer or partner of any power-tool brands.

  • Our products are custom modifications built by the HonkUp team.

  • The original tool brands do not manufacture, support, or endorse these modified products.

Being transparent and honest with our customers is a core part of how we work.


How We Build

Each horn goes through a clear and consistent process:

  1. We use a brand-new power tool and components as the base structure.

  2. We mount precision metal trumpets and installation hardware.

  3. Every horn is individually tested before shipping.

Every unit is assembled by hand — not mass-produced — and reviewed for sound output, stability, and overall safety.


Our Mission

We aim to create loud, fun, and memorable products for:

  • automotive enthusiasts

  • off-road and outdoor events

  • car meets and parades

  • sports events

  • professional or utility uses

  • anyone who simply enjoys powerful sound

HonkUp exists for people who want a handcrafted product — something built by real hands, with character and performance.


Contact Information

HonkUp — Symbiosis One Corp
23373 Timberlane Dr
Valencia, CA 91354
United States

Email: support@honkup.com
We respond to all messages within 24 hours.

Here’s how we modify the tools