Dual Tone Horn Kit — 420Hz / 520Hz, 120dB

A dual tone horn kit producing 120dB across two complementary frequencies — 420Hz (low pitch) and 520Hz (high pitch). The combination of two tones at different frequencies produces a louder, more attention-grabbing sound than a single-tone horn, cutting through road and ambient noise more effectively. Lightweight, weather resistant, and a direct plug-in replacement for the standard OEM horn using the original spade connectors. Suitable for road, rally, and motorsport use.

Key Specifications

• Tones: Dual tone — 420Hz (low pitch) and 520Hz (high pitch)
• Output: 120dB
• Supplied: Kit of 2 horns
• Cover: Weather resistant
• Fitment: Direct OEM replacement — accepts original spade connectors
• Installation: Bolt-in replacement, no wiring modification required

Why Dual Tone?

A single-tone horn produces sound at one frequency. A dual tone horn produces two complementary frequencies simultaneously — 420Hz and 520Hz — which combine to create a fuller, louder, and more penetrating sound. The dual frequency output is more effective at cutting through road noise, music, and ambient sound than a single-tone horn at the same dB rating, making it a genuine safety upgrade as well as a performance one.

Installation

Direct bolt-in replacement for the standard OEM horn. Simply remove the original horn, bolt the new horns in place, and connect using the original spade connectors from the existing wiring — no wiring modifications or relay required. Supplied as a pair with weather resistant covers for long-term durability.

Applications

• Road car horn upgrade
• Rally and stage rally 
• Track day use

Why Choose BRT Motorsport?

Specialists in motorsport components and performance accessories. Quality motorsport parts for road, rally, and circuit use from BRT Motorsport.