Your ride back
Upgrade your Vespa GTS or Vespa GTV with the Dr. Jekill & Mr. Hyde electronically adjustable exhaust system. Built for riders who value style, control, and performance, it transforms how your Vespa feels and sounds on every ride. Your sound adapts to your moment. Ride quiet through the city, switch to a deeper tone on open roads, or go full and expressive when it matters. With three adjustable sound modes, your Vespa fits every situation. Street legal in all sound modes. Always.
Every system is engineered to OEM standards, ensuring a seamless fit and finish that perfectly follows the iconic Vespa design. Nothing feels added or out of place, only enhanced. Premium European materials, precision craftsmanship, and over 25 years of engineering expertise come together in a system that looks like it belongs on your scooter from day one.
What truly sets this exhaust apart is its intelligent Smartbox technology. Fully integrated and continuously active, it reads your engine data in real time and ensures that your system always complies with European regulations. With full ECE, EG-BE, and TÜV approval, every mode remains 100% street legal, so you can ride anywhere, without worry or compromise.
The Dr. Jekill & Mr. Hyde exhaust is available for a wide range of Vespa GTS and GTV models, including both 300cc (2021–2024) and the latest 310cc models (2025–up):
GTS 300 // GTS 300 Super // GTS 300 Supersport // GTS 300 Touring // GTS 300 SuperTech // GTV / Grand Turismo Sport // Gran Turismo Vintage // GTS 310 // GTS Super 310 // GTS SuperSport 310 // GTS SuperTech 310 // GTV 310 // GTV Officina 8 310
Why choose Dr. Jekill & Mr. Hyde for your Vespa?
Whether you're commuting through the city or escaping it, this system gives you the freedom to shape every ride exactly the way you want.
Your Vespa. Three sounds. Zero compromises.
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When Dr. Jekill & Mr. Hyde decided to develop a system for Vespa, it was never just about a new exhaust. It was about how to translate the Vespa lifestyle into sound. A Vespa is not just an ordinary vehicle. It's a memory of summer evenings, Italian streets, freedom between past and present. And that's exactly where this system comes in.
Dr. Jekill & Mr. Hyde brings its decades of experience with electronically controlled exhaust systems into a world that has been dominated by classic solutions. Instead of a fixed sound, a system is created that adapts to the moment, the rider's mood, the environment, the situation. Whether quiet and restrained when cruising through the city in the early morning or rich and powerful on winding country roads in the afternoon - the sound follows you, not the other way around. The exhaust becomes part of the riding experience, not just technically, but emotionally.
The design remains deeply rooted in the Vespa DNA. Nothing feels forced, nothing screams for attention, but fits harmoniously into the lines of the GTS and GTV models. It's as if this exhaust has always been part of the Vespa idea, only now it finally comes to life. High-quality materials, exquisite craftsmanship, and a sense of substance make it clear that this is not just an accessory, but something enduring.
It is this combination of tradition and modern technology that makes the system so special. Vespa has stood for timeless elegance and character on two wheels for decades. Dr. Jekill & Mr. Hyde adds the sound, depth, and personality. Not loud for the sake of noise, but powerful, controlled, deliberate. A sound that accompanies you, reflects you, and makes your Vespa even more your own.
This creates something that doesn't feel like a product, but like an extension of your riding, your style, and your way of life. And that's exactly why it just feels right.
Pre-order now!
Be the first to ride with the sound of Dr. Jekill & Mr. Hyde when the time comes.
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Experience the sound of your Vespa GTS or Vespa GTV like never before. From refined and quiet to deep and expressive, each mode is engineered to match your moment. Listen closely—this is control, precision, and character in perfect harmony.
In Dr. Jekill mode, the exhaust operates with the valve closed, resulting in a refined and discreet sound. Ideal for cruising through residential neighborhoods or enjoying a quiet ride, the Dr. Jekill mode provides a muted exhaust sound without sacrificing performance. Activate Dynamic Mode and witness the transformation of your ride. When the valve opens halfway, the exhaust lets out a deep and resonant growl. Prepare for the ultimate sound experience when you activate Mr. Hyde mode. With the valve fully open, the exhaust unleashes its raw power and produces a thunderous roar that resonates with every twist of the throttle.
The Jekill and Hyde Company offers the ultimate riding experience. The Exhaust: an electronically adjustable exhaust system that allows you to choose between three different modes while riding. An exhaust that sets the bar in terms of performance, aesthetics, and sound.
Our exhaust systems embody three different personalities: Dr. Jekill mode, Dynamic mode, and Mr. Hyde mode. With a simple push of a button, a flap inside the silencer opens and closes, giving your exhaust more sound and performance. We attach great importance to the environment, so all our exhaust systems are designed to meet air quality standards.
Dr. Jekill & Mr. Hyde | The Exhaust is a fully legal exhaust system that complies with European laws and is also ECE, EG-BE, and TÜV certified. Our software is programmed to subtly and almost imperceptibly intervene when the legally set parameters are reached. This ensures that you are 100% legal in all modes.
Our exhaust systems embody three different personalities: Dr. Jekill mode, Dynamic mode, and Mr. Hyde mode. With a simple push of a button, a flap inside the silencer opens and closes, giving your exhaust more power and performance. You can choose to ride in Dr. Jekill mode, Dynamic mode, or Mr. Hyde mode depending on the situation. Whichever mode you choose, you are always 100% legal.
Dr. Jekill & Mr. Hyde | The Exhaust offers a fully legal exhaust system. The system has European type approval and complies with all European laws and regulations and is TÜV-certified. 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.
Quality is our top priority. Dr. Jekill & Mr. Hyde | The Exhaust not only looks good but is also a reliable and high-quality product. As our exhaust systems must withstand extreme (weather) conditions and extreme heat, they are extensively tested before going into production.
After passing tests, only the highest quality materials are used for production. The materials are sourced from trusted suppliers in Europe.
"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!"
"Very very good sound, legal and loud. Neighbours are left alone and it screams out on the street."
"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."
"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."
"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."
"Just awesome, no comparison to the original sound. I would never go without a Jekill again."
"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."
"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!"
"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 ;-) "
"Coherent optics and robust, not intrusive sound, I am very satisfied."
"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. "
"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."
"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..."
"Dark Horse in full gallop! Upgrading my Indian Chieftain Dark Horse was definitely worth it. Finally, the bike has the presence it deserves. The black look of the J&H system perfectly emphasizes the "Dark Horse" theme, and the sound of the open exhaust impressively showcases the powerful Thunderstroke engine. The Big-Shot end caps were absolutely the right choice for this bagger, and even a layperson can immediately see that this is a bike with serious power. For me, Jekill & Hyde is the first choice when it comes to quality, sound, and support!"
"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."
"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."
"Incredibly beautiful sound! Goosebumps guaranteed, even when you start the second/third/fourth time!"
"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..."
"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."
"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."
"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."
"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 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. "
“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?”
" 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."
"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!”
"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."
“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."
"Nice sound and looks very nice on my new Indian Chief Dark Horse."
“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."
"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! "
"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."
"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. "
"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."
"Very good exhaust system - perfect finish and street legal. And Smartbox 2 is awesome!"
"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!"
"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!"
"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!"
"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."
"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!!"
"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."
" 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!"
"I am very satisfied. Great look, mega sound and still legal. It was worth it."
"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!"
"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."
"This exhaust system is everything the manufacturer says it is. Keeps the peace in my home and neighborhood and gives the perfect sound."
"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."
Use the form to request an opportunity to strengthen our dealer network. We will process your details as soon as possible and will contact you. Submitting an application does not automatically lead to a dealership.
The advantages of becoming a Dr. Jekill & Mr. Hyde Vespa dealer are:
- You become the exclusive Dr. Jekill & Mr. Hyde dealer in your area for Vespa. We only work with a dedicated dealer network.
- Margins on every exhaust sale and you can fill up your workshop hours with installing Dr. Jekill & Mr. Hyde exhaust systems.
- Close cooperation with The Jekill and Hyde Company; our sales representatives and sales department are always at your disposal. Our online configurator gives the possibility for your customers to request a quote or order a system at your dealership.
- You deliver a unique, socially responsible product.
- Four year warranty included.
Order now and be among the first to experience the Dr. Jekill & Mr. Hyde exhaust for your Vespa GTS or Vespa GTV. Secure your system today and get ready to ride with the coolest sound for Vespa ever created.
