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'twenty-one'
2in1 exhaust
Your riding style might get you in trouble, your exhaust won't
* Please Note: Some images may show additional exhaust configurations, colors & options.
View all options available for this exhaust using our Exhaust Configurator Tool.
Thumbnail Filmstrip of Twenty-One Streetfighter Brushed Stainless Steel/Aluminium 21 Full Forward Narrow Brushed headerset Images
DESCRIPTION
Harley-Davidson Low Rider S & Lowrider ST Exhaust // Twenty-One with Streetfighter End Cap
Dr. Jekill & Mr. Hyde® for
the Harley-Davidson Lowrider S & Lowrider ST
(2022 - 2024) models.
Clubstyle Redefined with the New Twenty-One 2-into-1 Exhaust in Brushed Steel by Dr. Jekill & Mr. Hyde®
Crafted exclusively for the Harley-Davidson Lowrider S & Lowrider ST models from 2022 to 2024, the Twenty-One in Brushed Stainless Steel with a Streetfighter end cap in Aluminum is the ultimate performance upgrade. This complete package includes the exhaust and a matching set of headers in Brushed Steel, engineered for full forward foot controls. Riders can explore additional customization options, including finishes in Wrinkle Black and mid-control configurations for headers, using our Exhaust Configurator.
Performance Meets Innovation
The Twenty-One 2-into-1 exhaust by Dr. Jekill & Mr. Hyde® embodies the spirit of the clubstyle/performance scene. Its raw, stripped-down design complements the Harley-Davidson Low Rider S while delivering a bold performance edge. This electronically adjustable exhaust gives you complete control over your ride’s sound, blending cutting-edge technology with iconic Harley style.
Tailor Your Sound with 3 Dynamic Modes:
Dr. Jekill & Mr. Hyde®'s electronically adjustable sound modes let you match your exhaust note to any riding moment:
- Dr. Jekill Mode: A calm, understated tone perfect for city cruising or early departures, keeping the valve closed for a refined and discreet sound.
- Dynamic Mode: A balanced growl that accentuates the Low Rider S’s character, with the valve half-open to deliver an assertive yet composed exhaust note.
- Mr. Hyde Mode: Unleash the full power of the Low Rider S with an open valve that roars with intensity, providing an adrenaline-fueled soundtrack for the open road.
Fitment for: Harley-Davidson Lowrider S and Lowrider ST (2022-2024) models.
Finish Options: Shown here in Brushed Stainless Steel with a Streetfighter end cap in Aluminum. Use our Exhaust Configurator to explore additional finishes available include Wrinkle Black for both the exhaust and headers, along with a choice of Big Shot, Slashcut, or Streetfighter end caps in Wrinkle Black, Aluminum, or Bronze.
Header Configuration: Shown with Brushed Steel headers for full forward foot controls. Mid-control configurations are also available.
Sound Quality: The Twenty-One has been meticulously engineered and sound-tuned to offer unparalleled auditory performance, creating a soundscape that matches the Low Rider S’s rugged persona.
Warranty Assurance: Backed by Dr. Jekill & Mr. Hyde®’s trusted 4-year warranty.
Premium Construction: Designed with high-quality materials for durability, style, and performance that last, complementing the aggressive aesthetics of the Low Rider S.
Elevate your Harley-Davidson Low Rider S with the new Twenty-One 2-into-1 exhaust system in Brushed Steel—blending innovation, style, and performance for an unparalleled riding experience.
Explore the Sound Experience of the 'Twenty-One'
Immerse yourself in the unique sound of the 'Twenty-One' that elevates the power of the M8 engine to unprecedented heights. Experience the thrill of riding with a heightened feedback from your exhaust, encouraging you to push your bike a little further. The exhaust has undergone rigorous sound tests to deliver this perfect auditory experience, ensuring every ride becomes a symphony of power and precision.
THE LOOKS
Opt for the Twenty-One, and you'll receive a complete exhaust system featuring a header set and muffler. While our other Dr. Jekill & Mr. Hyde® exhausts boast a clean design, the Twenty-One stands out with a rugged and unpolished appearance, showcasing visible welds and a natural discoloration over time. This system is not only lighter than standard exhausts but also provides optimal ground clearance for a comfortable lean in the bends. Despite its raw aesthetic, the Twenty-One maintains the quality synonymous with Dr. Jekill & Mr. Hyde® products.
PERFORMANCE
Tailored for the clubstyle rider, performance takes center stage in the development of the Twenty-One exhaust. Compliant with legal standards, the Twenty-One substantially enhances your bike's performance. The exhaust's design eliminates performance loss when riding with a closed valve, ensuring a safe and smooth experience, regardless of the mode you choose.
GOING CLUBSTYLE
Harley-Davidson, deeply rooted in tradition, stands as a brand defined by its enduring pillars. The iconic chopper, effortlessly cruising down the American Highway, has become a timeless image etched into our collective consciousness. However, as with any tradition, there arises a shift in perspective, challenging its long-standing validity.
Emerging from the motorcycle club culture, where bikers navigated extensive distances, a movement took shape—shifting the focus from customizing Harley looks to optimizing performance. Modifications were directed at making bikes faster, more manageable, and agile enough to conquer corners with knees brushing the ground. Originating with the FXR, evolving through the Dyna, and seamlessly integrating into the latest Softails.
Clubstyle has become an undeniable force in today's Harley scene. For Dr. Jekill & Mr. Hyde®, it was a natural progression to craft an exhaust specifically tailored for this dynamic movement. Collaborating with esteemed partners from the clubstyle & performance scene, we initiated Project 21: the creation of the ultimate electronically adjustable clubstyle/performance 2-in-1 exhaust!
Tailor-Made Options
The Twenty-One offers a range of customization possibilities. Opt for a black or brushed edition for both the muffler and header set, and choose from a variety of end cap options – slashcut or streetfighter, available in black, aluminum, or bronze. Take it a step further by selecting between a full cover of shields or a more minimal cover for the header sets. Explore our exhaust configurator to discover the design that suits you best.
TESTIMONIALS
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David Peloubet (Fort Worth Texas USA) | July 16th, 2024
Great product. Works great. I am disappointed that a custom made product doesn’t have the logo mounted where they square up together with street. Both face down at the street
Wayne H. Crotty (Jasper, Fl) | July 4th, 2024
The ability to turn on and off the rumble is surprisingly impressive!! Thanks for making my 23 CVO a Harley!!
HOW IT SOUNDS
ELECTRONICALLY ADJUSTABLE EXHAUST
ADJUST YOUR SOUND TO THE MOMENT
Experience motorcycling like never before with The Exhaust from the Dr. Jekill & Mr. Hyde® Company. This electronically adjustable exhaust system offers riders the unique ability to tailor their sound experience, providing excellent performance, premium quality, and an extensive four-year warranty.
Dr. Jekill & Mr. Hyde® | The Exhaust delivers a top-tier exhaust with a four-year warranty, ensuring riders enjoy peace of mind with their purchase. The cutting-edge exhaust system allows riders to seamlessly switch between three distinct sound modes, enhancing every ride.
The result of German engineering and Dutch craftsmanship, The Exhaust embodies state-of-the-art technology meticulously crafted by seasoned engineers. Utilizing computer simulations, prototype building, and rigorous testing, Dr. Jekill & Mr. Hyde® have curated a bespoke exhaust for each motorcycle, showcasing a product created by riders for riders.
Adjust your sound to the moment with three sound modes
Dr. Jekill & Mr. Hyde® systems feature three distinctive personalities*: the Dr. Jekill mode, the Dynamic mode, and the Mr. Hyde mode. With a straightforward push of a button, a valve within the muffler seamlessly closes, opens, or partially opens, enhancing your exhaust's power and sound. This intuitive design equips riders with the flexibility to customize their sound experience according to the moment.
HD SOFTAIL SOUNDCHECK
USE YOUR HEADPHONES FOR THE ULTIMATE EXPERIENCE
Listen and enjoy the three different sound modes of the Dr. Jekill & Mr. Hyde - The Exhaust.
Mr. Hyde
Mr. Hyde Mode - The exhaust boosts a beautiful, deep rumble.
Dynamic
Dynamic Mode - A tamed Mr. Hyde sound.
Dr. Jekill
Dr. Jekill Mode - A calm, low-key but distinctive sound.
At Dr. Jekill & Mr. Hyde®, our sound engineers have meticulously tuned the exhaust tones to harmonize seamlessly with the unique character of the Harley-Davidson's engine across all sound modes. We take genuine pride in the remarkable sound quality and craftsmanship embodied in every Dr. Jekill & Mr. Hyde® Exhaust. The engine's power finds its ideal expression in the resonant and distinctive tones emanating from our exhaust system.
WARRANTY
4 year warranty
At Dr. Jekill & Mr. Hyde®, we take pride in the quality and durability of our products. Our exhausts are crafted to endure, designed and manufactured with longevity as a priority. Hence, we provide all new exhaust systems with a standard 4-year warranty.
For a precise understanding of the Dr. Jekill & Mr. Hyde® warranty terms, we encourage you to thoroughly review the warranty terms. Enjoy your exhaust with peace of mind.
VIDEO
FITMENT
| BRAND | FAMILY | MODEL | YEAR |
|---|---|---|---|
| Harley-Davidson | Cruiser | Lowrider S (FXLRS) with Full Mid Narrow Foot Controls | 2022-2024 |
| Harley-Davidson | Cruiser | Lowrider ST (FXLRST) with Full Mid Narrow Foot Controls | 2022-2024 |