On The Handlebar
Modeswitch
Direct control of the exhaust character from your handlebar. One push adjusts the valve to change the sound mode. Built for everyday use, it is weather resistant with a red indicator light when active.
How It Works
One exhaust, three sound characters, switched from your handlebar at the push of a button.
Valve closed. Quiet and refined.
The Core Of The System
The Valve
The valve is the heart of every Dr. Jekill & Mr. Hyde® exhaust. Electronically controlled, it moves between three positions to change the sound character at the push of a button.
Milled From Solid Metal
Machined from a single block to resist deformation and absorb vibration, for a more stable system and a cleaner sound.
Fully Sealed
The only exhaust manufacturer with a fully sealed valve, welded for a controlled bypass that balances sound, performance and emissions.
Nickel Plated Steel
Chemical nickel plating penetrates the steel for greater hardness and improved corrosion resistance.
Built For Heat
A double layered housing with a ball joint keeps resistance low, so the valve operates smoothly as temperatures rise.
Engineered For Your Bike
A Look Inside The Exhaust
Every Dr. Jekill & Mr. Hyde® exhaust is engineered for the bike it is built for, through simulation, prototyping and precision tuning. Inside, the Modeswitch, Smartbox, servomotors and valve work together so the sound adapts to the road, the environment and the way you ride.
What's Inside
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Exchangeable end caps available in a variety of designs.
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Extender with lambda probe, only on 2 in 2 Softail models, except the Fat Bob 114.
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Stainless steel construction.
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Secondary exhaust chamber.
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Patented damping material made of single strand fibers, covered with a heat resistant layer. No repacking necessary.
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Patented valve system to tune your performance on the fly.
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Primary exhaust chamber with a unique damping system that filters out mid and high frequencies.
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Catalytic converter.
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Double layered body to prevent discoloring and keep temperatures down.
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Leak free connection.
From Handlebar To Valve
Parts & Placement
Four precision components work together to control sound, response and rider interaction. Here is where each one sits on the bike.
The System
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Modeswitch
The handlebar button that selects your sound mode.
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Smartbox
The control unit that reads your bike's signals and manages the response.
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Servomotor
Moves the valve into position with precision.
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Valve
Changes the gas flow inside the exhaust to shape the sound.
Inside The Controls
The Components
Press the button and three components go to work, from your handlebar to the valve inside the exhaust.
The Electronics
Smartbox
The control unit at the heart of the system. It reads CAN bus signals from the bike's ECU in real time and manages how the selected mode works with the bike's operating parameters, so the system reacts smoothly and within its intended limits.
The Muscle
Servomotors
On the Smartbox's signal, dual cable servomotors move the valve precisely between closed Dr. Jekill, 50% open Dynamic and open Mr. Hyde. Heavy duty cables and a fully waterproof seal keep adjustment strong, reliable and durable.
Push The Button
Push 1x For
Dr. Jekill Mode
Dr. Jekill Mode
Push 1x Again For
Mr. Hyde Mode
Mr. Hyde Mode
Push 2x For
Dynamic Mode
Dynamic Mode
Choose Your Bike To Hear It
These recordings only hint at the real thing. It is a sound you feel, not just hear. Hear it in person at our next event or a dealer near you.
Real Recordings
Sound Check
Pick a brand, then play any model to watch and hear its Dr. Jekill & Mr. Hyde® exhaust in action.
Ready When You Are
Find Your Sound
Build the exhaust for your bike, or grab a system that is ready to ship today.
