4.5" Manually Adjustable Exhaust System
Dr. Jekill & Mr. Hyde®for
Harley-Davidson Touring Models
Revolutionize Your Ride with Jekill & Hyde's NEW Manually Adjustable 2-into-1 Exhaust Systems for The HD Milwaukee-Eight Models.
Introducing the New 2-Into-1 Manually Controlled Exhaust System
For over 25 years, Dr. Jekill & Mr. Hyde has set the standard in electronically adjustable exhaust systems. In 2025, we're taking it further with our all-new manually controlled exhaust systems crafted in Holland and launched with the Western distributor, Jekill and Hyde US. This is more than performance; it's control.
Unmatched Sound and Performance, Now in Your Hands
Upgrade your Harley-Davidson with our premium exhaust systems, available in manual and electronic options. Engineered for Harley Touring models, they seamlessly integrate with the 2025 Road Glide 117, Street Glide 117, and all Milwaukee-Eight models, delivering unmatched customization.
Tailor Your Style, Define Your Journey
Designed for versatility, our 4.5" exhaust system lets you switch between a deep, powerful rumble and a refined, quiet tone adapting to your ride. Available in Chrome or Black with Big Shot or Slashcut end caps, it maintains OEM fit and style. Whether manual or electronic, take full control of your Harley's sound and experience the road like never before.
Harmonizing Power and Sound
Unlock the full auditory potential of your Harley-Davidson's engine with the Dr. Jekill & Mr. Hyde®4.5" Exhaust System. Experience a deep, resonant rumble that enhances your ride, blending power with a refined sound. Whether you choose the manual or electronic option, you'll have complete control over the sound, switching between a quiet, refined tone and a powerful roar to match your mood and riding style.
CONFIGURE EXHAUSTManually Controlled:Operated by a mechanical switch discreetly positioned beneath the fuel tank.
Perfect Fit:Designed for all Harley-Davidson Milwaukee-Eight Touring models (2017-present).
Customizable Sound:Easily switch between all 3 modes with a sleek mechanical switch.
Optimized Performance:Enhances exhaust flow, backpressure, throttle response, and torque.
Durable Build:High-quality stainless steel resists heat and corrosion.
Easy Installation:Direct-fit design requires no modifications or tuning.
Street Legal:C.A.R.B. & EPA compliant for emissions standards.
4-Year Warranty:Backed by Jekill & Hyde's quality guarantee, every system comes with a 4 year, unlimited mile warranty.
Custom End Caps:Choose Big Shot or Slashcut in Black or Chrome.
Premium Finish:Available in Stunning Chrome or Bold Black.
Innovative Technology:Precision-engineered for manual adjustment and reliability.
OEM Fit:Compatible with stock cases and passenger footpegs.
Own the road with the unmistakable sound of Dr. Jekill & Mr. Hyde's® latest masterpiece. The future of sound is here. The power is in your hands.
HD Touring // 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
The exhaust boosts a beautiful, deep rumble.
Dynamic Mode
A tamed Mr. Hyde sound.
Dr Jekill
A calm, low-key but distinctive sound.
Technology
The Valve
At the heart of every Dr. Jekill & Mr. Hyde® exhaust system is the valve, the technology that makes The Exhaust truly unique. Electronically adjustable on the fly, it gives you full control over how your bike sounds, with three distinct modes that adapt to the moment. From a refined, more subtle tone with the valve closed, to a deeper, more aggressive character in Dynamic Mode, all the way to the full, uncompromising sound of Mr. Hyde with the valve wide open, you decide exactly how your bike performs and sounds every time you ride.
Innovation
Research & Development
At Dr. Jekill & Mr. Hyde®, innovation never stands still. Every exhaust system is born from intensive research, advanced engineering, and relentless testing under real-world and extreme conditions. Inside our state-of-the-art facility, we are constantly pushing our products harder, refining every detail, and improving every system to stay far ahead of the competition.
From sound control and valve technology to performance, durability, and long-term reliability, nothing is left to chance. Every part is tested, every system is challenged, and every improvement is driven by one goal: to build the most advanced exhaust system on the market.
Craftsmanship
Premium Quality
For over 30 years, Dr. Jekill & Mr. Hyde® has defined the standard in premium exhaust systems. German engineered and Dutch handcrafted, every system is built in Europe to deliver unmatched sound, aesthetics, and performance. Designed to withstand extreme heat, harsh conditions, and years of riding, each exhaust is rigorously tested and built using premium stainless steel and advanced Nomex packing for lasting durability. This is not your average exhaust system, this is craftsmanship without compromise.
Frequently Asked Questions
Do You Have Questions?
Here we answer the most common questions about Dr. Jekill & Mr. Hyde® exhaust systems.
Dr. Jekill & Mr. Hyde® systems are premium exhaust systems built around engineering, materials, fit, finish, and electronically adjustable sound control.
Each system is developed specifically for the motorcycle, designed as a precise fit, and built with advanced components like the electronically controlled valve system that gives you multiple sound modes at the push of a button.
You are not just buying a muffler. You are buying a complete premium system with advanced technology, model-specific development, and a 4 year warranty.
If your bike is completely stock, no tune is required.
Our exhaust systems are German engineered to perform properly in every sound mode and are developed around a stock motorcycle setup.
If your bike has aftermarket modifications such as a decatted header, cam, or high-flow air filter, we recommend contacting your local dealer or reaching out to us directly so we can advise you on the best setup.
No, not if you are installing our exhaust on a stock bike.
Our systems are designed as plug-and-play solutions for stock motorcycles and do not require a tune.
To take it a step further, in Europe we are an official partner of Harley-Davidson, and our exhaust systems are available exclusively through authorized Harley-Davidson dealers.
While the setup is a bit different here in the United States, that partnership reflects the strength of our relationship with Harley-Davidson and the level of trust our systems have earned at the corporate level.
No. Dr. Jekill & Mr. Hyde® exhaust systems are designed to be plug and play, with a precise fit for your motorcycle and no complicated modifications required on stock applications.
Installation is straightforward for any mechanically inclined person. If you are not mechanically inclined, please have the system installed by your dealer.
You can buy our exhaust systems directly through us, through our dealers, or at events.
If you want help choosing the right system or locating a dealer, our team can point you in the right direction.
