Pre-order now! The 'Twenty-One' - 2in1 Exhaust - Dr. Jekill & Mr. Hyde | Electronically adjustable exhaust for motorcycles | Best sound | Street legal
04 Sep '20 Dr. Jekill & Mr. Hyde | News

Pre-order now! The 'Twenty-One' - 2in1 Exhaust

Inspiration, Blogs, News, Press, Harley-Davidson

After months of designing, building and prototyping Dr. Jekill & Mr. Hyde presents the 'Twenty-One', a unique 2-in-1 electronically adjustable exhaust for all 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 raw and stripped design makes this exhaust must-have on any Milwaukee-Eight Softail.

twenty-one 2in1 exhaust

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. The exhaust has been subjected to extensive sound tests to create this perfect sound experience.

When you choose to ride a Twenty-One you get a full exhaust system with a header set and muffler. Where all other Dr. Jekill & Mr. Hyde exhausts are very clean, we have opted for a rough and unpolished look with this one, including visible welds and discoloring over time. The system is lighter than standard systems, has optimal ground clearance so you can hang comfortably in the bends. But despite the rough and raw look, it matches the quality you are used to from Dr. Jekill & Mr. Hyde.

twenty-one 2in1 exhaust

For the clubstyle rider performance is of great importance, so this has been taken into account massively in the development of the Twenty-One exhaust. Within the legally permitted standards of course, the Twenty-One significantly increases the performance of your bike. Thanks to the design of the exhaust, there is no loss in performance while riding with a closed valve. This ensures a safe and smooth riding experience, regardless of the mode you ride in.

Dr. Jekill & Mr. Hyde | The Exhaust is a completely street legal system and complies with European legislation and laws, as well as being EC/ECE/EG/ABE/ EEC/EU/ECE/EGBE and TÜV tested. So in short: your riding style might get you in trouble… your exhaust won't!

twenty-one 2in1 exhaust

The Twenty-One is customizable. For the muffler and header set you can choose between a black and brushed edition, with a slashcut or streetfighter end cap in black, alu or bronze. The header sets can be equipped with a full cover of shields or a minimal cover. Visit our exhaust configurator to see what design fits you best.

Share our story