SEQR Low Frequency Horn Upgrade Kit – Toyota GR Supra A90/A91

Fix one of the most common complaints of the Toyota GR Supra — the factory horn.

The Sequential Racing Low Frequency Horn Upgrade Kit is designed specifically for the GR Supra A90/A91, adding a powerful low-frequency tone alongside the factory horn to create a louder, fuller, and more commanding sound. The result is a premium dual-tone horn setup that dramatically improves road presence while retaining OEM functionality.

Unlike the factory Supra horn, which is often criticised for sounding weak, quiet, and high-pitched, our custom-developed horn solution adds a deep low-frequency note that delivers a more authoritative and attention-grabbing sound when it matters most.

Manufactured in the USA and engineered for reliability, this 12V dual-horn setup is designed to work seamlessly with the factory horn system while maintaining OEM-like operation.

Key Features & Benefits

• Designed specifically for Toyota GR Supra A90/A91
• Sequential Racing custom horn upgrade
• Powerful 133dB output
• Dual-horn configuration
• Works alongside the factory horn
• Adds deeper low-frequency tone
• Significantly louder than OEM horn
• Improves road presence and safety
• Premium USA-made construction
• 12V operation
• OEM-style functionality
• Long service life exceeding 100,000 activation cycles

Sound Characteristics

Factory Supra horn:

• High-pitched tone
• Limited road presence
• Often difficult for surrounding drivers to hear

Sequential Racing Low Frequency Horn:

• Deep, aggressive low-frequency tone
• Fuller dual-tone sound profile
• Enhanced vehicle presence
• More premium European-style horn sound

Technical Specifications

• Operating Voltage: 12V
• Sound Output: 133dB
• Frequency: 400Hz Low Frequency
• OEM Supra Horn Frequency: Approximately 500Hz
• Dual-Tone Operation
• Service Life: >100,000 Cycles
• Made in USA

Vehicle Fitment

• Toyota GR Supra A90 (2019+)
• Toyota GR Supra A91 (2021+)

Compatible with both factory and modified vehicles.

Installation Available

Professional installation available at: Sequential Racing Altona North, Victoria

Our team can supply and install the complete horn upgrade kit for a hassle-free OEM+ upgrade experience.

Why Choose the Sequential Racing Horn Upgrade?

After installing hundreds of GR Supra modifications, one thing became obvious — the factory horn simply doesn't match the presence of the vehicle.

Our custom low-frequency horn solution was developed to provide a louder, deeper, and more premium horn sound while maintaining factory integration and reliability.

• Designed specifically for the GR Supra
• Deep low-frequency tone
• OEM+ functionality
• USA-made quality
• Professional installation available

Give your Supra the horn it should have come with from the factory.