Hella Horns

Hella Supertone Horn Kit 12V 300/500HZ (003399801)

Rating: 5.0 out of 5.0 (14)
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Hella Supertone Horn Kit 12V 300/500HZ

Every other part of your performance vehicle wants to be heard, but the horn is the only part that NEEDS to be heard.

The Hella Supertone Horn kit is a powerful upgrade for the safety of your 2002-2017 Subaru WRX or STI models. This dual kit provides an important 118 decibels of warning power, to ensure you are heard when you need to be. The horn emits tones at two frequencies — a high 500 Hz and low 300 Hz. The mounting bracket fits right behind the grill of your Subaru. Each horn is mounted in a rugged red case for attractive visibility.

This is one of the few products we sell that offers zero horsepower gains, and we’re OK with that. The Hella Supertone Horn will change your car’s meek meep-meep sound into a powerful blast that will be heard at the most critical moments.


  • Power Consumption: 2 x 66W
  • Frequency: 500Hz (high tone) & 300Hz (low tone)
  • Acoustic Pressure Level: 118 dB(A)
  • Nominal Voltage: 12V
  • Part Number: 3AG 003 399-801 (with relay)


  • Universal

What's in the box?

  • 1 Supertone Horn Kit


  • MFGR. Limited Warranty

Customer Reviews

Based on 14 reviews
Shelby Coral
Hella LOUD!

Worked great for my 97 Honda Prelude, the original horns gave out on it before I got it so I decided to get some aftermarket ones. Gotta say these probably scared the daylights out of every neighbor in my neighborhood when testing them! They are LOUD! Not to mention they are also double the size of OEM Honda horns.

Excellent upgrade from OEM !

I enjoy the tone and the different ways to feature them is great!

Eh Htoo
Sound amazing.

Fast install and look amazing.

Albert Silva

Looks sick and are loud af def recommend. super easy to install

Diana Calderon
Good sound

Very good