Hella Twin Trumpet Horn Kit — 12V Red, High/Low 110 dB with Relay & Bracket

The HELLA 007424801 is a 12V twin-trumpet horn kit delivering a sharp high/low tone combination (500Hz + 400Hz) and a penetrating 110 dB sound, supplied with a relay and mounting hardware for universal vehicle fitment.

Designed and manufactured with German engineering standards, this HELLA twin trumpet horn kit combines durability, clear acoustic performance and easy installation. The kit contains a high-tone and a low-tone trumpet, an M8 screw bracket, flat 6.3 mm blade connectors, a relay and mounting instructions. Its compact footprint makes it suitable for passenger cars, light commercial vehicles and many off-road applications where a reliable audible warning is required.

How loud and distinct will this horn be on the road?

The twin trumpet design produces a concentrated, attention-grabbing tone that cuts through traffic noise. With a rated sound pressure around 110 dB(A) and complementary frequencies (500 Hz high, 400 Hz low), the pair creates a clear harmonic signature that is easier for other road users to recognize.

• Rated sound level: 110 dB(A) for strong audibility
• High tone: 500 Hz and low tone: 400 Hz for harmonic clarity
• Twin-trumpet arrangement enhances directional perception

What comes in the HELLA 007424801 kit and what hardware is included?

The kit is supplied as a complete package ready for installation. You receive both horn trumpets, a relay for reliable electrical switching, two mounting brackets and straightforward installation instructions so you can fit it with basic tools.

• 1 high-tone trumpet (500 Hz) and 1 low-tone trumpet (400 Hz)
• 1 automotive relay included for stable 12V switching
• Two mounting brackets and an M8 screw horn bracket for secure attachment
• Flat 6.3 mm open blade electrical connections for easy wiring

How does installation and compatibility work for different vehicles?

The HELLA twin trumpet horn kit is designed for universal application on 12V systems, making it compatible with most cars, light trucks and off-road vehicles. The included relay minimizes load on the factory horn circuit and the supplied bracket options accommodate a range of mounting points.

• Voltage/Current: 12 V / 6 A — fits standard 12V electrical systems
• Mounting: M8 screw bracket plus two additional brackets for flexible placement
• Dimensions: approximately 5.00" high × 4.30" wide × 3.2" diameter including bracket

What kind of build quality and standards does HELLA provide?

HELLA engineers its acoustic warning products with longevity and consistent performance in mind, drawing on over a century of automotive component experience. These horns are made to meet strict ECE and original equipment technical requirements used by vehicle manufacturers.

• Manufactured with precision components for reliable long-term use
• Designed to meet industry ECE requirements and OEM specifications
• Materials and assembly tailored for corrosion resistance and vibration durability

Who is this for? Drivers who want a dependable, loud and distinctive horn—without the fuss of custom fabrication—will appreciate this HELLA twin trumpet kit. It suits DIY installers, mechanics and vehicle owners upgrading from factory horns who need a compact assembly with proven acoustic performance and secure mounting options. Ideal for everyday commuter cars, utility vehicles and light off-road rigs that require a robust audible warning solution.