How it sounds

Experience the differenceMore performance equals better sound

When you ride in Mr. Hyde mode, the valve opens and you do not only feel the increase in power, you also hear it. As a company we find it necessary that this sound is not ‘loud and annoying’. Our specialized engineers have crafted a tailor-made sound for every bike that on the one hand gives riders the ultimate riding experience, but on the other hand is not a nuisance to others. 

By making sure the increase in power is accompanied with a deep bass sound without any treble or mid tones. Dr. Jekill & Mr. Hyde | The Exhaust provides you with a complete product that combines the best elements of performance, design and sound quality.


But enough talking.. check it out for yourself below!


start how it sounds

push the button

Push 1x for
Dr. Jekill mode

Dr. jekill mode

Push 1x for 
Mr. hyde mode

Mr. hyde mode

Push 2x for 
dynamic mode

Dynamic mode

turn off your bike

in all performance modes 100% street legal

Dr. Jekill & Mr. Hyde | The Exhaust is a completely street legal system and complies with European legislation and laws. Our software is programmed to intervene subtly and almost imperceptibly when the parameters set by the legislation are reached. This ensures that you are 100% legal on the road in all riding modes.

The smartbox; the electronic control unit in our exhaust systems is the brain of our product. Thanks to its ability to read canbus signals coming from the motorcycle’s ECU, the Smartbox makes sure you will not end up on the wrong side of the law, no matter what mode you select and will seamlessly intervene if necessary.

  • Dr. Jekill mode
  • Dynamic mode
  • Mr. Hyde mode


Our exhaust systems embody three distinct personalities: the Dr. Jekill mode, the dynamic mode and the Mr. Hyde mode. By a simple push of a button a valve inside the muffler closes, open or opens halfway. The rider can choose per situation whether or not he wants to ride in the Dr. Jekill mode, dynamic mode or unleash Mr. Hyde when the surroundings allow it.

Learn more

Increase your performance We understand the rider

For most riders their motorcycle is more than just a means of transportation. It’s part of a lifestyle, the ticket for adventure or maybe an escape from your 9 to 5 job. Whatever it is, here at The Dr. Jekill & Mr. Hyde Company we love to ride our bikes and we want to enhance your riding experience to the fullest.

We understand that you want performance, looks and power! All this and more is what a Dr. Jekill & Mr. Hyde | The Exhaust system has to offer your bike. You want to hear the powerful rumbling sound of your V-Twin on the open road, but at the same time do not want to wake up the whole neighbourhood when you start your bike in the morning. Or perhaps you go on a long trip with your BMW and want to fully take in your surroundings with as little sound as possible, with a touch of a button you are even more silent than the original. To put it simple: you are in control of who you want to be with Dr. Jekill or Mr. Hyde.

Another aspect for the enjoyment of your journey is the fact that with a Dr. Jekill & Mr. Hyde exhaust system you ride 100% legal, regardless in which mode you ride. This way you can go for a ride wherever you want, without the worry of getting fined or worse..


Last but not least. Personal touch and customisation are important factors for many bikers. Therefore we offer a range of different exhaust designs and various end cap designs. But why don’t you check it out for yourself on our configurator. Power, esthetics, performance and 100% legal: Dr. Jekill & Mr. Hyde | The Exhaust is the ultimate electronical exhaust system in today’s market and will take your riding experience to the next level.


Quality Marks