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Apr '26
Dr. Jekill & Mr. Hyde | News
Dr. Jekill & Mr. Hyde introduces the Track Series: a new line of electronically adjustable exhaust systems designed for riders who want maximum sound and performance without the limitations of road homologation requirements. The product is exclusively available through Motorcycle Storehouse's dealer network, Europe's leading distributor of V-Twin and custom parts.
What Is the Track Series?
The Track Series is a slip-on exhaust system engineered for Harley-Davidson Touring motorcycles. Unlike the brand's standard street exhausts, the Track Series operates without Smartbox software intervention — the regulatory software layer that manages valve position to comply with road noise limits.
The result is a raw, unrestricted riding experience. Riders can still choose between three electronically adjustable sound modes — from subtle and controlled to deep and fully unleashed — but without the electronic restrictions required for road homologation.
Note: The system is designed for environments where sound restrictions are less strict, such as racetracks, off-road settings, and custom builds.
Two premium configurations
The Track Series is available in two configurations, both built from high-grade European materials:
- 2-2 Slip-On — the classic dual-pipe setup.
- 2-1 Slip-On — a sleek, single exhaust pipe configuration.
Both systems are designed to work with original stock headers. Where applicable, a left-side header cap is included for a clean installation. Customizable end caps are available to match individual bike builds.
Performance Benefits
By removing the limitations required for road homologation, the Track Series allows the engine to breathe more freely. Key performance advantages include:
- Optimal exhaust flow and reduced back pressure.
- Faster throttle response and a more direct connection between rider and machine.
- A sound profile that remains balanced at cruising speed but becomes strong and aggressive under acceleration.
- Lightweight and heat-resistant construction for consistent performance under demanding conditions.
Compatible Harley-Davidson Touring Models
The Track Series is available for a range of Harley-Davidson Touring models, including:
- Road Glide (2017–2019, 2024–2026)
- Street Glide (2017–2019, 2024–2026)
- Road Glide ST / Street Glide ST (2023)
- Electra Glide Highway King (2023)
- Street Glide Special (2017–2023)
- Road King / Road King Special / Road King Classic
- Ultra Limited / Ultra Limited Low
- CVO Road Glide ST (2024–2026)
- CVO Street Glide 121 / CVO Road Glide 121 (2023–2025)
- CVO Road Glide Limited / CVO Street Glide 117 and more
25 Years of Engineering — No Compromises
Dr. Jekill & Mr. Hyde has been setting the standard in electronically adjustable exhaust systems for more than 25 years. The Track Series uses the same proven valve technology and strict production standards as the brand's street line, and comes with a 4-year warranty. By removing the Smartbox software layer — which adds complexity for road compliance — the brand is able to offer the Track Series at a more competitive price point without sacrificing the premium quality the brand is known for.
Where to buy
The Dr. Jekill & Mr. Hyde Track Series is exclusively available through Motorcycle Storehouse. The partnership combines Dr. Jekill & Mr. Hyde's advanced exhaust technology with Motorcycle Storehouse's strong European dealer network and deep roots in the V-Twin and custom motorcycle industry.