General questions
At the push of a button, you can switch between three sound modes: Dr. Jekill (Closed), Dynamic (Mid), Mr. Hyde (Open).
Dr. Jekill & Mr. Hyde | The Exhaust is a completely legal exhaust system that complies with European laws and is ECE, EG-BE and TÜV approved. Our exhaust systems are tested and developed following the highest European standards and guidelines. Our systems are compliant with the highest obligatory standards in:
- Emission
- Sound levels
- Performance
This means that it is a fully street legal system and that it is compliant with the European legislation and laws.
Yes — the system is designed for real-time, on-the-fly switching while riding.
We offer exhaust systems specifically engineered for a wide range of motorcycle models. Use our configurator, look our product details or contact our team to confirm compatibility before placing your order.
Our exhausts are model-specific. Transferring the system to another bike usually isn’t possible unless it's the exact same make and model.
No — for regulatory reasons, the system always starts in the closed (Dr. Jekill) mode when you restart your motorcycle. You can then manually switch to your preferred sound mode.
It’s difficult to provide an exact dB increase, as it depends on several factors — including your motorcycle model, engine type, selected sound mode, RPM, throttle position, and acceleration. Our system is engineered to stay within legal limits while delivering a deep, powerful tone that adapts to how you ride.
Purchasing through a certified dealer ensures professional installation and local support.
Shipping & Returns
Yes, we ship globally. Delivery times and costs vary by region and will be calculated during the checkout process.
We ship all orders via UPS to ensure fast and reliable delivery. You will receive tracking information as soon as your package is dispatched.
Once your order is processed, you will get a notification.
Do not mount the system and take detailed photos of the product and packaging and contact us immediately at customer-service@jekillandhyde.com.
Note: All deliveries take place according to Incoterms® 2020 – Ex Works (EXW). This means that goods are collected at our location and that transport and insurance costs, as well as risks during transport, are the responsibility of the customer.
Returns may be accepted if the product is unused and in original condition. Contact our customer service before returning anything. The final call in the return policy is made by customer service.
Miscellaneous
Our systems are built to maintain optimal performance with stock ECU settings
We offer direct online sales exclusively for selected Triumph, BMW andVespa models to ensure streamlined support and inventory management.
For other brands, sales go through authorized dealers who provide expert installation, local service, and personalized customer care. This helps maintain quality and compliance across all product lines.
Some aftermarket products, such as foot pegs, panniers, or engine guards, may interfere with the installation or operation of our exhaust system. Our systems are developed on stock motorcycles.
We recommend checking compatibility before installation, especially with parts mounted near the exhaust. When in doubt, consult your dealer or contact our support team.
Our exhaust systems are proudly developed and assembled in the Netherlands. Most components are sourced from high-quality European suppliers, ensuring durability and precision.
Returns may be accepted if the product is unused and in original condition. Contact our customer service before returning anything. The final call in the return policy is made by customer service.
Installation & maintenance
Yes, but we highly recommend having the system installed by a professional mechanic. Our electronically adjustable exhausts require correct placement and connection of electronic components to function properly.
The manual is delivered with the system and is also available on the product page.
On average:
- Professional technician: 1.5–2 hours
- Skilled DIYer: 2–4 hours
This can vary depending on your motorcycle model. The difficulty level is noted with every product.
Basic hand tools are sufficient for most installations. However, precise torque settings and correct routing of the electronics may require professional equipment and expertise. A list of the required tools is included in the installation manual provided with the system.
No. The electronic control unit and valve mechanism are essential components of the system and cannot be bypassed or disabled without compromising functionality and legality.
Each system includes:
- Exhaust system (headers and/or silencers, depending on model)
- Servo motor and wiring harness
- Handlebar control unit
- Mounting hardware
- Installation manual
Periodically check the cable tension and tighten the end cap bolts after the first 100 km. Never lubricate or force the valve manually.
No remapping is typically required. Our systems are engineered to function seamlessly with OEM ECU settings. If your bike has performance upgrades, consult your technician.
First, check all connections and cables. Refer to the troubleshooting section in the manual. Contact our support team via email or phone.
Discover more in our FAQ
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Support hours: Monday-Friday, 9am-4pm
