Speed TwinSpeed Twin
Fun never sounded that good. Customize your Triumph Speed Twin with Dr. Jekill & Mr. Hyde | The Exhaust.
Dr. Jekill & Mr. Hyde offers an electronically adjustable exhaust for Triumph Motorcycles that gives you the opportunity to adjust your sound to the moment and choose a sound mode for every situation. At the push of a button. Be eloquent and silent if you wish or be heard when the situation asks for it.
Triumph's passion and innovative power has shaped the evolution of motorcycles. Always focused on a complete, tailor made riding experience, without forgetting its rich history and incorporating it into their timeless, versatile models. Stylish, eloquent but still badass.
3 sound modes - All 3 sound modes of The Exhaust emphasize the full potential of the Triumph engine and are an imminent addiction to the riding pleasure. A tailored sound that is always present and distinct, yet never just 'loud' or even a nuisance. Like the Triumph rider it stands out, yet remains sophisticated.
Street legal - And let's not forget that all this riding pleasure is accompanied with the peace of mind that your Dr. Jekill & Mr. Hyde exhaust is legal in all three sound modes. It has a European type approval and thus complies with all European laws and regulations, as well as being CARB/EPA and TÜV tested. You can adjust your sound to the moment and stay within the limits of the law.
Enjoy the new sound of your bike with a premium quality exhaust that comes with 4 years of warranty. Ride classic, sound legendary!
We will start offering a tailor-made exhaust for three different Triumph Euro 4 models: the Bonneville Bobber, Speedmaster and Speed Twin, which will be available soon. More models will follow.
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Do you want receive updates about Dr. Jekill & Mr. Hyde | The Exhaust for Triumph Motorcycles, or do you want to become an official dealer? Click on one of the links below and fill in the form.
Fun never sounded that good. Customize your Triumph Speed Twin with Dr. Jekill & Mr. Hyde | The Exhaust.
Where looks meet sound. Customize your Triumph Bonneville Bobber with Dr. Jekill & Mr. Hyde | The Exhaust.
Modern technology wrapped in a classic design. Customize your Triumph with Dr. Jekill & Mr. Hyde | The Exhaust.
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The Jekill and Hyde Company gives motorcyclists the ultimate riding experience with The Exhaust. Our electronically adjustable exhaust system gives you the possibility to adjust your sound to the moment and offers street legality, excellent performance and premium quality.
Dr. Jekill & Mr. Hyde | The Exhaust offers a completely street legal, premium quality exhaust with 4 years warranty. Our exhaust system makes it possible to choose between three different sound modes on the fly, which makes every ride spectacular!
The Exhaust is a result of German engineering and Dutch craftsmanship. With state of the art technology, perfectly crafted by the best engineers in town. With computer simulations, the building of prototypes and extensive testing, we’ve created a tailor made exhaust for each and every bike. By riders, for riders.
Dr. Jekill & Mr. Hyde 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, opens, or opens halfway, giving your exhaust more power and sound. This gives you all the tools to adjust your sound to the moment. 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 in all riding modes.
Dr. Jekill & Mr. Hyde | The Exhaust offers a completely street legal exhaust. It has a European type approval and thus complies with all European laws and regulations, as well as being CARB/EPA and TÜV tested. The reason for this is that every Dr. Jekill & Mr. Hyde system contains a smartbox: this electronic control unit is the brain of the product and contains software that reads CANBUS signals coming from the motorcycle’s ECU.
By committing the system to the parameters set by EU legislation, the Smartbox will seamlessly and subtly intervene if necessary. Riders don’t have to worry about breaking the law in any situation; the system is always legal no matter what sound mode is selected.
Do you want to be one of the first to know important updates about The Exhaust for Triumph? Please fill in the form and we will include you in our communication! The latest news will be delivered directly to your inbox.
"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."
"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."
"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!"
“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?”
"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."
"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."
"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!"
"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!!"
“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."
"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."
"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..."
“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."
"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."
"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!”
"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."
"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. "
"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!"
"Very good exhaust system - perfect finish and street legal. And Smartbox 2 is awesome!"
"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."
Sound, design, quality; it all has to be top notch. But this result cannot be pursued without the perfect finish. And that is where the dealers come into play. Dr. Jekill & Mr. Hyde can only be purchased through an extensive dealer network. Every dealer has extensive knowledge of the exhaust system and is properly trained in assembling, testing and maintaining the system. This is an essential requirement, otherwise the quality of The Exhaust cannot be guaranteed. This automatically means that consumers can only buy the system through an official dealer. Are you interested in becoming one? Please follow the link to our subscribtion form.
Dr. Jekill & Mr. Hyde is the leading developer and supplier of electronically adjustable exhaust systems today. Located in The Netherlands, the company has already equipped more than 100.000 riders with an electronically adjustable exhaust system and the demand is still growing rapidly. Dr. Jekill & Mr. Hyde has remained fully independent and all design and development is in-house. This ensures that we can respond quickly and effectively to market demands and offer products that perfectly match the prevailing needs. Everything with one clear purpose: give motorcyclists the ultimate riding experience!