The Ultimate Sound
Electronically Adjustable Exhaust For Indian Chief
Take control of how your Chief sounds. Three sound modes, one button on the handlebar, changed on the move. Street legal, EPA and CARB compliant.
Dr. Jekill mode keeps it quiet for early mornings and long days in the saddle. Dynamic adds real presence. Mr. Hyde opens the valve fully and the Thunderstroke arrives, heavy, deep and unmistakable.
Designed around the Chief itself, the fender line, the fork, the shape of the engine, so it reads as part of the motorcycle instead of something bolted to it. German engineering, Dutch craftsmanship.
Older Chief Classic or Chief Vintage? Different motorcycle, built before the 2021 redesign. Get in touch and we will tell you what fits yours.
Premium European materials, model specific fitment, tested against extreme heat and weather. Backed by a 4 year warranty.
All Chief Models We Build For
Chief // Chief Dark Horse // Chief Bobber // Chief Bobber Dark Horse // Super Chief // Super Chief Limited // Super Chief Dark Horse // Sport Chief // Sport Chief RT
The Valve
The Three Sound Modes
With the valve closed, Dr. Jekill mode keeps the Chief composed. Roll out of the driveway before the block is awake, sit in traffic without turning heads, ride through town without a conversation about it. The character is all still there, it just stays between you and the motorcycle.
Control At Your Fingertips
Switch Modes From The Handlebar
One push opens and closes the valve. A double tap sets it half open. All three sound modes, on the move, without taking your hands off the bars.
- Dr. Jekill Valve closed. Quiet and composed for early starts and residential streets.
- Dynamic Valve half open. Deeper and fuller, with real presence behind it.
- Mr. Hyde Valve wide open. The Thunderstroke at full voice, heavy and unmistakable.
Premium Slip On Kit
The Supreme
A short, timeless 2 into 2 design drawn to the dimensions of the Chief. The 4.0 inch body sits wide and low, and the whole system runs noticeably shorter than the OEM depending on which end cap you pick, which leaves room to build the rest of the bike the way you want it.
Pick your finish, then pick your end cap, Streetfighter, Big Shot or Slashcut. The Supreme sets the Thunderstroke loose, deep and rumbling in Mr. Hyde, composed and civil in Dr. Jekill, all from the button on your bars.
Configure Your ExhaustSound Check
Listen To The Supreme
Headphones or a good speaker recommended.
- Dr. Jekill Valve closed. Mild and composed, made for long days out and for leaving without waking the street.
- Dynamic Valve half open. Real presence through the 4.0 inch body without ever wearing on you.
- Mr. Hyde Valve wide open. The Thunderstroke set free, deep rumbling strokes and nothing held back.
Full 2 Into 1 System
The Twenty-One
A complete system from the heads back, not a slip on. Full stainless construction, heat shields included, raw and stripped underneath the way a 2 into 1 should look. Everything the Supreme gives you, taken further.
This is the best sounding option we build for the Chief. Same three modes, same button on the bars, but the whole exhaust path is ours now, and the Thunderstroke lets you know it.
Configure Your Exhaust
Sound Check
Listen To The Twenty-One
Headphones or a good speaker recommended.
- Dr. Jekill Valve closed. Still civil, still neighborly, even on a full system.
- Dynamic Valve half open. Fuller and harder edged than the Supreme at the same setting.
- Mr. Hyde Valve wide open. Everything from the heads back is ours, and this is the best sound we get out of a Chief.
The Supreme Exhaust System is available on the in stock product page.
View In Stock ProductIn Stock Now
Build It Your Way
What you see here is what we hold on the shelf, ready to ship today. It is one of several ways a Chief system can be built.
Every finish and end cap combination is available to order. Pick your model, choose your finish, choose your end cap, and see the whole system come together before you buy.
Our systems are typically built to order. Allow 2 to 4 weeks for delivery on anything not shown in stock above.
Configure Your ExhaustInstallation Support
Installation Video
Press play and follow along step by step. Every system is fully plug and play, no cutting wires and no splicing, and printed instructions come in every box, so you always have two references to work from.
Run into a question partway through? Reach out and we will walk you through it.
Contact Us
Why Sound Control Matters
One Exhaust, Every Setting From Whisper To Roar
A Chief gets ridden everywhere, from your own street at six in the morning to an open road on a Sunday, and one fixed volume cannot cover all of it. Whichever system you choose, you get the full range on demand, quiet where it needs to be and wide open where it does not.
1
Keep Your Neighbors
Close the valve for early departures and late arrivals so the whole street does not know your schedule.
2
Better For Your Passenger
Whoever is on the back sits right where the exhaust carries, so a quieter setting makes riding two up far more pleasant.
3
Read The Room
Parking lots, campgrounds, downtown at noon. Some places call for presence, others call for restraint.
4
Unleash The Thunderstroke
Open it to Mr. Hyde and let the V-twin run heavy and deep, the way a Chief should have sounded all along.
Indian Chief FAQ
Questions Before You Order?
The most common questions about the Supreme and the Twenty-One, our adjustable exhaust systems for the Indian Chief.
The Supreme is a slip on. It keeps the classic 2 into 2 shape the Chief was drawn with, runs a 4.0 inch body, and comes shorter than the OEM depending on your end cap. Choose it if you want the factory silhouette with a better voice and a straightforward install.
The Twenty-One is a complete system from the heads back, full stainless with heat shields included, 2 into 1, raw and stripped underneath. It is the best sounding option we build for the Chief. Choose it if you want maximum sound and a leaner look, and are comfortable with a larger job.
Still not sure? Get in touch and tell us what you ride and how you ride it, and we will tell you which one fits the way you use the bike.
Our systems are typically built to order, so allow 2 to 4 weeks for delivery. Every system is made for a specific motorcycle in the exact configuration you choose, which is why it is not sitting in a warehouse waiting.
Anything listed as in stock on this page ships right away. If you need it by a particular date, contact us before ordering and we will give you a realistic answer.
On supported stock configurations, no tune, fuel tuner, or ECU flash is required. Each system is developed around the factory setup of the motorcycle.
Already running an intake, a fueling change, or other performance parts? Ask your mechanic or shop first, or contact us and we will help point you in the right direction.
Yes. You can change the valve position and ride in any sound mode at any point in time.
Switch between Dr. Jekill, Dynamic, and Mr. Hyde mode from the handlebar control, giving you quiet control when you need it and a stronger exhaust note when you want it.
Yes. Our Chief systems are street legal, EPA and CARB compliant, and designed around the stock setup of the motorcycle.
Local noise rules can still vary by where you live and ride, so it is worth knowing your area. If you have any questions, contact us before ordering and we can help point you in the right direction.
Every system is fully plug and play. No cutting wires, no splicing. Follow along with the installation video, and printed instructions come in every box, so you always have two references to work from.
The Supreme is a slip on and goes on quickly. The Twenty-One is a full system from the heads back, so plan on more time. For a competent mechanic both are straightforward, though the exact time depends on tools, experience, and the condition of the motorcycle.
Dr. Jekill & Mr. Hyde® systems are premium exhaust systems built around advanced engineering, high quality materials, precise fitment, refined finishes, and electronically adjustable sound control.
Each system is developed specifically for the motorcycle and built with advanced components, including an electronically controlled valve system that gives you multiple sound modes at the push of a button.
The adjustable sound control also gives you something a permanently loud exhaust cannot, flexibility. You can fly under the radar when the situation calls for it, keep the sound controlled in neighborhoods and noise sensitive areas, help avoid expensive noise violation citations, and stay on your neighbors’ good side. When the time and place are right, you can switch to a deeper, more aggressive sound with the push of a button.
You are not just buying a muffler or another exhaust system. You are investing in premium engineering, advanced technology, model specific development, everyday flexibility, and a 4 year warranty.
