Breakout
The most badass Softail, now with Dr. Jekill & Mr. Hyde | The Exhaust.
The ultimate Harley icon. Customize your Harley-Davidson® Softail with Dr. Jekill & Mr. Hyde | The Exhaust.
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Harley-Davidson®Softail®
Muscles. Power. Design. Complete the ultimate Harley icon with Dr. Jekill & Mr. Hyde | The Exhaust.
The most distinctive American motorcycle, the Harley-Davidson Softail, blends tradition with modernity. Now give all your senses a jumpstart by adding the perfect exhaust to the perfect bike. You are in command.
Grab the attention of everybody in the street with Dr. Jekill and Mr. Hyde | The Exhaust. With a perfect fit, performance and attitude it completes every family member of the Harley-Davidson Softail range.
The Exhaust for Softail® is available for:
Fat Bob® // Street Bob® // Sport Glide® // Low Rider® // Softail Slim® // Breakout® // Fat Boy® // Heritage Classic // Blackline® // Softail® Deluxe // Crossbones // Rocker // Deuce // Springer // Softail® Custom // Softail® Standard // Night Train // Bad Boy
Choose your softail Harley-Davidson
electronically adjustable exhaustAdjust your sound to the moment
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 mode
- Dynamic mode
- Mr. Hyde mode
adjust your sound to the moment three sound modes
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.
How it sounds
USE YOUR HEADPHONES FOR THE ULTIMATE EXPERIENCE Soundcheck
Listen and enjoy the different sound modes of Dr. Jekill & Mr. Hyde.
Push a button to start.
Dr. Jekill Mode
Mr. Hyde mode
Dynamic Mode
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European type approval street legal
Dr. Jekill & Mr. Hyde | The Exhaust is a completely legal exhaust system that complies with European laws and is ECE, EG-BE and TÜV approved. 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.
Clubstyle / performanceTwenty-One Exhaust
Dr. Jekill & Mr. Hyde presents the 'Twenty-One', a unique 2-in-1 electronically adjustable exhaust for Milwaukee-Eight Softail Models
The Twenty-One is made for an audience that wants to take riding a Harley to a whole new level of performance and sound. With this in mind Dr. Jekill & Mr. Hyde created an exhaust that meets all the needs of the clubstyle / performance scene, without abandoning the characteristic features and innovations of a Dr. Jekill & Mr. Hyde exhaust system. Brace yourself for an exhaust that not only performs like a beast, but also sounds like one.
The ‘Twenty-One’ contains a sound that really brings the power of the M8 engine to new heights, in ways you'd never expected. The thrill of driving is enhanced by a brighter feedback from your exhaust, challenging you to demand that little bit extra from your bike. Combined with the raw and stripped design this exhaust is a must-have on any Milwaukee-Eight Softail rider who strives for clubstyle!
this is whyRiders love us
"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."
"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!"
"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."
"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."
"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."
"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. "
"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."
"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."
"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."
"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!"
"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! "
"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!!"
"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."
"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. "
"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."
"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."
"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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THE EXHAUST FOR softail
Customize your own Dr. Jekill & Mr. Hyde | The Exhaust. Pick your brand, model, body colour, endcap and electronics, and make it yours. Let’s build something beautiful.