Premium top-quality materials | Dr. Jekill & Mr. Hyde

Premium quality

only the best is good enoughPremium quality materials

Quality is one of our most important core values. Dr. Jekill & Mr. Hyde | The Exhaust does not only look and sound great, it also needs to be a reliable and high quality product. On this page you will find out which different parts make our exhaust system the best on the market.

All our exhaust systems need to withstand all kinds of extreme (weather)conditions and extreme heat. Therefore they are thoroughly tested, before going into production. When all the tests are passed and an exhaust becomes available to the public, only the highest quality materials are used for the production which are all sourced from trusted suppliers in Europe.

Dr. Jekill & Mr. Hyde | The Exhaust offers a street legal, beautifully designed exhaust. This is a result of German engineering and Dutch craftsmanship with state of the art technology, perfectly crafted by the best engineers in town. 

Integrated switch

Our electronically controlled and adjustable system allows riders to open and close the exhaust valve with a push of a button. Choosing Dr. Jekill & Mr. Hyde means choosing for the best quality. Every Dr. Jekill & Mr. Hyde exhaust system has an integrated switch in a high quality clutch housing, with an optimal fit between all other components on the handlebars. Also the colour of the button integrates perfectly. This way it looks like it's part of the original setup. The button is fully weather-resistant and flickers a red light when activated for your convenience.

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Solid valve

The valve is the heart of our product and makes our exhaust system truly unique. Thanks to the valve, our exhaust systems are electronically adjustable in three positions. We strive for the best riding experience, so the valve must always function optimally in every situation. One of the main reasons we can achieve is that we use a solid valve.

Our valve is milled from a block, pure solid metal. This prevents the valve from deforming and it absorbs the vibrations, giving you a stable and better sounding product. The valve housing is double layered with a ball joint, because during the heating phase while riding you want to keep the resistance as low as possible at all stages.

Dr. Jekill & Mr. Hyde is the only exhaust manufacturer with a valve that is fully sealed. The valve is chemically nickel-plated and therefore enters the pores of the steel, thereby boosting the hardening and protects against corrosion. The valve is welded in the middle, which gives the exhaust gases the possibility to bypass. The optimum position for sound, performance and emission and not visible from outside, which fits with our clean optic perfectly.

Premium Absorption Fabric

Every Dr. Jekill & Mr. Hyde’s exhaust system contains premium absorption fabric just below the body sleeve. Our glass wool is heat resistant up to 800 degrees. We do not work with loose fibers, but with one single thread. With this we guarantee an optimal lifespan. The thread is held in place by a temperature blanket, also used by NASA for the space shuttle. This blanket prevents the temperature from being passed on to the body. As a result, no discoloration occurs.


The absorption fabric is one of the main reasons our exhausts provide a nice damping; it filters the high and mid tones from the exhaust sound which result in the typical Dr. Jekill & Mr. Hyde character and optimal emission values.

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on the exhaust Serial number 

Every Dr. Jekill & Mr. Hyde system is built-to-order, which makes it customer-specific and therefore unique. All our systems are assembled and checked in three different stages to ensure the high standards we expect from our products. Than each exhaust system is then given a unique serial number. This, among other things, optimizes traceability so that your dealer can view all information about your unique exhaust system.

you choose Interchangeable end caps

At Dr. Jekill & Mr. Hyde it’s all about choice, choose your sound and choose your exhaust. But this also applies on a more detailed level, like for example your end caps. Dr. Jekill & Mr. Hyde offers a wide array of end caps in different colours. And you know what is the coolest thing? If you want to give your bike a different look, you can simply change them at your dealership! Go here to get inspiration.

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every system is unique Built to order

Because of the endless range of possibilities of exhaust configurations, we do not have a stock of pre-assembled systems. When you make a configuration and decide to order it via your dealer, the configuration lands in our production facility. Upon receiving your order, all parts are collected and the exhaust gets assembled according to your preferences. That makes every system unique and built for you!

just to help you out 100% traceability

Because of the unique number on your exhaust, the system is always traceable. No don’t worry, big brother is not watching you. We don’t know where you are riding, but should you ever encounter a problem with your exhaust, this unique number provides us with necessary information to help you out. We can see when the exhaust was made, at which dealership it was mounted and much more.

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the perfect finish Dealer training

We often get the question from our customers why we won’t let them mount the systems themselves. Even if our systems are designed to make the mounting as easy as possible, it remains a delicate procedure, where a small mistake can result in the system not working properly. That is why that all of our dealers get trainings from our sales representatives. This means that they know not only how to mount a system, but also are trained to solve problems if they should occur.

the big shot End caps from two components

The Big Shot end cap might be our most standout and recognizable end cap. Without tampering with the design we decided to update the chrome version. Being a solid piece of metal, it became very vulnerable to damage from riding. That is why we decided to rework the end cap and to come up with a more robust version. To achieve this goal we developed a Big Shot end cap that is made out of two pieces instead of one. The core is made out of aluminum and the outer shell is made out of stainless steel. The space in between the two pieces makes sure that the shell does not overhead. Furthermore the outer shell is designed to suffer much less damage when it would hit or scratch something on a ride.

 

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what people say about us
User Stories

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"For me, no other system was ever considered."  
  |   Street Bob

"The perfect finish when it comes to design. For me, no other system was ever considered. EURO 5 and the push on the button lets us know why we ride Harley."

 

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"Goosebumps guaranteed!"
Christopher Falk  |   Sportster

"Incredibly beautiful sound! Goosebumps guaranteed, even when you start the second/third/fourth time!"

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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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"...this button that turns beauty into a beast!"
Peter Janczik  |   BMW GS

"The name really says it all: Dr. Jekill & Mr. Hyde! Apart from the great workmanship and the fantastic quality, it rounds off the entire look of my R1250GS Adventure TripleBlack perfectly. Then there is this button that turns beauty into a beast! What really impressed me is the possibility to be even quieter than a series with it. And every now and then there is this itch in the left thumb, with the subsequent grin on the face. "

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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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"Nice sound."  
Luc Thielemans  |   Chief

"Nice sound and looks very nice on my new Indian Chief Dark Horse."

 

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"There's a night mode for those who come home late at night ;-)"
Martin Wyss  |   Breakout

"I've never regretted the decision to go with the Dr. Jekill & Mr. Hyde system and I look forward to every trip with the beautiful, deep and powerful sound. There's a night mode for those who come home late at night ;-) "

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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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"An experience for my ears and soul!"
Andreas "Harley-Sportster-Lifestyle"  |   Harley-Davidson Sportster

"It's just awesome I can ride my bike to work at 5 a.m., without getting into trouble with the neighbors! But when I'm on the open road, press the button on the handlebars and the valve in the muffler opens, the show begins! The best sound you can imagine, bassy, muffled, every meter I ride becomes an experience for my ears and soul! Without worrying about a traffic control! I can only recommend: get a system, it is worth every penny."

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"It was worth it."
Christopher  |  

"I am very satisfied. Great look, mega sound and still legal. It was worth it."

 

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"An incredibly intense sound in open mode."
Dirk Zetzsche  |   BMW R18

"My Dr. Jekill & Mr. Hyde exhaust system is installed at BMW Munich. An incredibly intense sound in open mode and whisper-quiet when closed. And it looks good too."

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"Legal and loud!"  
Dennis  |  

"Very very good sound, legal and loud. Neighbours are left alone and it screams out on the street."

 

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"Now my Bobber is complete."  
Julia Bystrzinski  |   Bobber

"Now my Bobber is complete. The sound is crisp & direct and the riding fun has another dimension now. Thanks that I could join the Jekill & Hyde family..."

 

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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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"I am a person with emotion - the sound of the motorcycle has to be top notch."
Frank Schelper  |   Harley-Davidson Breakout

"I've hesitated for a long time to buy a Dr. Jekill & Mr. Hyde exhaust system. This year I finally got the heart to configure and order the exhaust system according to my wishes. After the exhaust system was mounted on my Harley-Davidson Breakout and I picked up the machine, and I was fascinated by the sound after the first 5 km. I haven't regretted my decision since. It's also a wonderful feeling not to be out on the road with an illegal exhaust system anymore. I will continue to enjoy the sound in my ears every mile. This is another reason for me never to buy an electric motorcycle, athough I am convinced that electric motorcycles also have a certain charm. But unfortunately I am a person with emotion - the sound of the motorcycle has to be top notch."

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"What a fantastic sound."  
Joost Westhof  |   Low Rider S

"What a fantastic sound is now coming from my Harley Davidson Low Rider S. I can't wait for the riding season to start again so I can test the system properly and enjoy the beautiful sound and performance."

 

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"The sound is really perfect!"
Stefan S  |   Harley-Davidson Fat Bob

"I have installed my second J&H system, first on my HD Custom and since 2018 on my HD FatBob BJ 2018. What can I say, the sound is really perfect, not too loud, but also not too quiet, a bass tone, that fits the bike perfectly. I also looked and listened to other manufacturers, but then decided in favor of J&H. The advice and after sales service at J&H is great and I personally recommend all my biker friends to buy from you! The BEST! "

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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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"Dr. Jekill & Mr. Hyde makes the hair on the neck stand up."
Sportster Forty-Eight Icon  |   Harley-Davidson Sportster

"When I bought a Harley Davidson Sportster Forty-Eight, it quickly became clear to me that I had to replace the exhaust system. Of course, only one exhaust system was an option for me. The quality, optics and of course the sound of the Dr. Jekill & Mr. Hyde is simply unique on the market and all of this is still 100% legal. I would also like to highlight the great selection of end caps at this point, which allow each customer to customize. The change from the original system to the Dr. Jekill & Mr. Hyde exhaust system, transformed my Harley's sound from a lawnmower into a black beast. As soon as the infamous button is pressed, the hair on the neck stands up. Emotions and moments of happiness that Dr. Jekill & Mr. Hyde gives every motorcycle rider with their products. "

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"This is the exhaust I wish came stock!"
Terrance Cooley  |   Scout

"Completely changed the game for me. My previous exhaust had a nice tone but they were just too loud - I was setting off car alarms at idle. I wasn't enjoying riding anymore. When I heard the Dr. Jekill & Mr. Hyde exhaust though, I had to have it. The tones and volume were exactly what I was looking for, a button press away from inoffensive neighborhood bike to mean and proud cruiser with a tap. This is the exhaust I wish came stock!"

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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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"This is the best upgrade you can do on your bike."
Gerco Goote  |   Road King Special

" Today was my first ride on my Road King Special with the J&H exhaust. What a revelation. It felt like a brake had come off the bike and the sound is magnificent. This is the best upgrade you can do on your bike. My bike is Euro 5 and there it still works. The sound of the Mr. Hyde mode is warm and dark. The looks are also great. This exhaust is just what you need on your bike."

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"I can't get the grin off my face anymore!"
Stefan Senkfell  |   Harley-Davidson Fat Boy

"The best decision I've ever made to have this mega exhaust fitted! There is simply NOTHING BETTER !!! Should be standard on every Harley - I can't get the grin off my face anymore!"

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"This is exactly what a Harley-Davidson should sound like!"
Alessandro Silverfox  |   Harley-Davidson Sportster Iron 1200

"From my point of view the best sound by far. This is exactly what a Harley-Davidson should sound like, nice and bassy. The Dr. Jekill & Mr. Hyde increases the driving pleasure by 100% and if you want to be a little gentler on the road, you always have the option to choose between the 3 levels. In addition, the quality and service are unbeatable, in my opinion the BEST system on the market. I don't want to be without them on any machine and would recommend them anytime."

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'This sound impresses!'
Berti Schlottii  |   Indian Roadmaster

"In town, I use the quiet, Dr. Jekill mode. As soon as I leave the city I press the button and switch to dynamic mode, the middle position. I find this sound mode very comfortable. But if the situation asks for it, for example when drivers sticking too close to my license plate, the valve opens to the Mr. Hyde mode. And that sound impresses! With my wife on vacation, only dynamic mode is allowed. But if I am alone then..."

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"Thank you for this simply ingenious exhaust system."
André (@Bluebobber48)  |   Harley-Davidson Sportster

"I will never forget the moment when my 48 was brought home to me and I pressed the button for the first time. There was an incomparable, bassy sound, as it should be for a Harley. An absolute dream for every Harley rider. For me it is optically and technically by far the best system on the market and I would buy it again 100%. The look is perfect and the riding pleasure is absolutely unique. Thank you for this simply ingenious exhaust system."

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"No comparison to the original sound."
Andrej  |   Harley-Davidson Sportster

"Just awesome, no comparison to the original sound. I would never go without a Jekill again."

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"Don't hesitate any longer and get a Dr. Jekill & Mr. Hyde exhaust!"  
Philipp  |   Street Bob

"Simply awesome!!! The unique sound makes every kilometre in the saddle a (sound) experience and hey, each of us only has 1 life, so I can only say to anyone who is still thinking: don't hesitate any longer and get a Dr. Jekill & Mr. Hyde exhaust immediately and you will enjoy every second on your bike even more, I promise!"

 

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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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"I am very satisfied."
Olav Schnier  |   R18

"Coherent optics and robust, not intrusive sound, I am very satisfied."

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"Keeps the peace in my home."  
Jack Panitch  |   Street Bob

"This exhaust system is everything the manufacturer says it is. Keeps the peace in my home and neighborhood and gives the perfect sound."

 

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"Real quality of workmanship"  
Thomas Eckl  |   Bonneville Bobber

" I have had your exhaust on my Triumph Bobber for about 4 weeks now, so I would like to tell you about my impressions. First of all, let's talk about the quality of workmanship. I myself am a quality engineer from the mobile industry and I have to give you a big thumbs up. The build quality is impeccable and there is really no reason to criticise it. Now for the sound, when you press the button and the flap opens, I immediately have a grin on my face, the sound is powerful and muffled, you can feel it on your chest and downhill when pushing the Bobber bubbles away wonderfully. I find the sound perfect, not too quiet and not annoyingly loud, just right! The half-open position is also very pleasant in terms of sound and perfect for a leisurely, more relaxed ride. I'm really pleased with this exhaust, it really makes a great bike out of the Bobber, both visually and sound-wise. It's very nice when people turn around to see what's coming. Thanks for this great exhaust!"

 

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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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"Best exhaust system I have ever had on a bike!"
Terje Andre Mangseth  |   Bagger

"The deep rumbling sound and the estethics of the Dr. Jekill & Mr. Hyde exhausts is the «!» on this Indian beast, turning heads like no other! I am very pleased with both quality and performance, and my neighbours appreciate the gesture of silencing the roar of the engine with a touch of a button. No tuning needed what so ever, fully customized for my ride - it is simply awesome! Best exhaust system I have ever had on a bike!"

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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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"Every time I start my bike I get goosebumps."
Nick Vanhoof  |   Indian Scout

"I'm very satisfied with the exhaust! Every time I start my bike and let the deep bass sound rattle, I get goosebumps. It motivates my inner beast to get the best out of my Scout and enjoy the wonderfully pleasant and rough sound- only then I can fully enjoy a perfect motorcycle ride."

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"Legal with perfect sound."
Sascha Koerner  |   Harley-Davidson Fat Boy

"Just WOW! I've had a motorcycle license since I was 18, but I've never bought a bike. My dream was to buy myself a Harley by the age of 40, but it didn't quite work out. But shortly before my 41st I did. The Dr. Jekill & Mr. Hyde system simply rounds it off, it is pure riding pleasure when you are out and about in Mr. Hyde mode. That's how a Harley has to breathe. Just yesterday, I rode to a gas station, and when I came out again, my bike was being inspected by another Harley rider. I just said, can I help? His answer: just wanted to see what you're riding, it sounds mega, I got to have it. I can just say thank you! Legal with perfect sound."

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"Great quality, sound and instructions!"
Carsten Soejbjerg  |   FTR

"Love it, great sound when open, and great that you dont wake the neighbours in the morning (unless you want to:-) Great quality, sound and instructions!"

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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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"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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"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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"I can only recommend the Supreme."  
André  |   Chief

"The Supreme exhaust system from Dr. Jekill & Mr. Hyde gives my Indian Chief Dark Horse a unique bassy sound, as benifits an American cruiser! I can only recommend the Supreme to anyone who owns an Indian Chief."

 

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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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"Give your BMW R18 the sound this bike deserves."
Motor Venray  |   BMW R18

"The Dr. Jekill & Mr. Hyde exhaust gives your BMW R18 the sound the bike deserves. Because of this glorified sound, you get the experience that one is looking for on a cruiser. Because the sound of the exhaust can be adjusted via the electronically controlled system, you can enjoy cruising anywhere and anytime with this characteristic motorcycle."

For those interested, the BMW R 18 can be seen and heard at Motor Venray with the exhaust from Dr. Jekill & Mr. Hyde."

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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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"When so many beautiful things happen to you, that's worth 5 stars plus..."
Christian Sharkey Scherkenbach  |   Heritage

"When the sound hits you in the stomach, the ground trembles under your feet and a broad grin adorns your face, then for the first time you have pressed the button on your new Dr. Jekill & Mr Hyde exhaust system. When so many beautiful things happen to you, that's worth 5 stars plus..."

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