How it sounds

Experience the difference Go for 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!

USE YOUR HEADPHONES
FOR THE ULTIMATE EXPERIENCE

start how it sounds

push the button

Push 1x for
Dr. Jekill mode

Dr. jekill mode
Enabled

Push 1x for 
Mr. hyde mode

Mr. hyde mode
Enabled

Push 2x for 
dynamic mode

Dynamic mode
Enabled

turn off your bike

in all sound modes 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 street 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.

the-valve-100%-street-legal

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Sound on!

what people say about us
User Stories

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"The best sounding R1200 exhaust to date."
Derrick Creighton  |   BMW GS R1200

"Exquisite fit and finish, well laid out packaging and installation instructions. The adjustable exhaust sound level works flawlessly, and is very convenient to adjust to your mood and environment. The exhaust note is a nice mix of volume and bass tone. To me Exquisite fit and finish, well laid out packaging and installation instructions . The selectable exhaust noise level works flawlessly, and is very convenient to adjust to your mood and environment. The exhaust note is nice mix of volume and bass tone. To me the best sounding R1200 exhaust to date."

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"A clear plus for safety!”
Werner - Berrt Travel  |   BMW GS

"Mr. Hyde position (valve open) is also ideal if I am quietly riding through traffic jams. The heavier sound is more noticeable and combined with a small speed difference it has a huge effect on the reaction of cars and trucks. A clear plus for safety!”

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"A must-have on your bike!"
Thomas Peerlinck  |   Harley-Davidson Streetbob

"I have my Dr. Jekill & Mr. Hyde exhaust for one year now, 6.500 km on the 2019 Street Bob 107ci stage I with S&S teardrop intake... and VERY HAPPY! Amazing sound, deep, dark and loud, but quiet when necessary (neighbours, city center, horses or small kids around...) all this legal with certificate. This head-turing piece of art is a must-have on your bike!!"

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"Ride in stealth mode and not disturb anyone."
Jean - GS enthousiast  |   BMW GS

“I love to ride along the shores of Gérardmer Lake (Vosges, France). A beautiful place full of walkers, cyclists and sports enthusiasts. When I drive here I always use the Dr. Jekill mode, which gives me the possibility to ride in stealth mode and not disturb anyone. But when I make my way back on the meandering roads of Col de Bonnefontaine I switch to the Mr. Hyde mode to enjoy the delicious rumble that echoes through the mountains around me and at the same time warn oncoming traffic that I am approaching. Great right?”

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"The unique powerful sound I was looking for."
@dysnrider  |   Harley-Davidson Sportster

"Dr. Jekill & Mr. Hyde offers the unique powerful Harley sound I was looking for. Which is more bassy, but still civil enough for daily rides. Even the possibility of adjusting the valves with just a push of a button is very comfortable on longer tours. You get something for the price and it's worth it."

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"I feel like I'm the king of the streets."
@mawi_davidson  |   Harley-Davidson Sportster Forty-Eight

"When I ride with my motorcycle I feel free. And when I ride with my Dr. Jekill & Mr. Hyde exhaust I feel like I'm the king of the streets. And when everybody looks at me and give me a thumbs up I know I made the right decision choosing this exhaust system."

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"100% legal and yet the full Harley sound."
@strandfahrer  |   Harley-Davidson Street Bob

"So, What I particularly like about the Dr. Jekill & Mr. Hyde exhaust is the deep sound, the quality and that the valve is inside the silencer. I also think it's great that you can change the look of the exhaust afterwards by replacing the end caps. 100% legal and yet the full Harley sound is absolutely great, especially in Germany."

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"Perfect for off road rides or near residential areas."
Nikki van der Spek - GS Trophy participant 2020  |   BMW GS

"When you close the valve then the exhaust is quiet but sounds very smooth. Perfect for off road rides in nature or near residential areas. But when you open the valve and open the throttle, then the GS has a beautiful sound. Loud but not too loud, just perfect. It has a nice and dark sound."

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"The Exhaust gives you a real fighting mentality."
Xavier  |   BMW GS

“The Mr. Hyde mode allows me to communicate better with my motorcycle. Due to the different sound modes you get more feedback from your motorcycle, which helps, among other things, to signal when something is wrong with the motorcycle. For example when the tires have to be replaced. Mr. Hyde mode really wakes you up during a long drive or when I go off-road; it activates and motivates you. It gives you a real fighting mentality."

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"Legal, but still a beautiful deep Harley sound."
Harley Dutchies  |   Harley-Davidson Sportster

"I got to know Dr. Jekill & Mr. Hyde at a motorcycle fair. I was impressed by this exhaust system from the first moment. But after a test drive I was sold. Wonderful to drive being able to play with the sound. The fact that it is legal, but still gives a beautiful deep Harley sound was the deciding factor in choosing Dr. Jekill & Mr. Hyde and they are also beautiful under my bike, also not unimportant. My bike passed the strict RDW inspection and I can confidently cross the (German) border without worrying. "

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"Choose your own style."
@marc_stone82  |   Harley-Davidson Sportster Forty-Eight

"If you are looking for a high quality and exactly finished exhaust system which can be modified to your own style you have to choose Dr. Jekill & Mr. Hyde! On top you also get the possibility to change your sound levels easily by a push of a button."

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"Perfect finish and street legal."
Martin Brunner  |   Harley-Davidson Fat Boy

"Very good exhaust system - perfect finish and street legal. And Smartbox 2 is awesome!"

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"Great sound. Totally worth the investment!"
KTM African Adventure  |   KTM 1090 Adventure

"Love my Dr. Jekill & Mr. Hyde! Street legal, more power and 3 great sound modes with a push of a button. And my bike is 1,5 kg lighter too. Totally worth the investment!"

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"It feels like I have 3 different exhausts."
JAAP - GS TROPHY TEAM NL  |   BMW GS

“Dust, mud, extreme weather ... I ride a BMW GS as it is meant to be! A motorcycle that breathes adventure must occasionally go off the paved road and offroad! “I used to drive with an exhaust that had only one mode, which means that there was only one sound. This was not really contributing to the driving experience. Driving with a closed valve on the paved road and opening the valve off-road really adds an extra dimension to the driving experience; it feels like I have 3 different exhausts! It is a great concept: if you show it to other people, you get a lot of positive feedback."

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"Roaring sound and pure performance!"
Walter Wais  |   Harley-Davidson Sportster

"Dr. Jekill & Mr. Hyde is the best investment in my bike so far!!! It adds 100% more driving fun. I can adjust the volume according to my needs, and at the push of a button a roaring sound and pure performance. And the best of all it's street legal. Many thanks to the Dr. Jekill & Mr. Hyde Team - great job keep it up!"

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

the valve THE THREE SOUND MODES

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

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The Exhaust in 8D Audio

Dr. Jekill & Mr. Hyde

Increase your power 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 sound, 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.

 

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