New Dr Jekill & Mr Hyde exhaust projects

Current projects


Your riding style might get you in trouble... your exhaust won't 'Twenty-One' for Harley-Davidson Touring Models

Introducing the latest innovation from Dr. Jekill & Mr. Hyde - a high-performance 2-1 exhaust system designed specifically for Harley-Davidson Touring models. Building upon the success of the acclaimed 'Twenty-One' exhaust for Milwaukee-Eight Softails, this new system embodies the same philosophy of sound and power.

The exhaust system offers three sound modes: Dr. Jekill mode with a closed valve for a refined sound, Dynamic Mode with a halfway open valve for a deep growl, and Mr. Hyde mode with a fully open valve for a thunderous roar. No matter the sound mode, the 'Twenty-One' exhaust guarantees a great, street legal auditory experience with a balance of performance, comfort, and excitement.

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2 into 1 exhaust
for Indian Chief

Get ready to be amazed by the new sound and design concept of our exclusive, electronically adjustable 2-1 exhaust system for the Indian Chief motorcycle. This incredible creation seamlessly blends stunning beauty with an electrifying sound, offering three sound modes and street legality. In development for Indian Chief, Chief Bobber, Sport Chief and Super Chief.


The Twenty-One exhaust by Dr. Jekill & Mr. Hyde is designed to elevate the performance and sound of Indian riding, catering to the performance scene while retaining the characteristic features and innovations of a Dr. Jekill & Mr. Hyde exhaust system. Brace yourself for a beastly performance and sound, complemented by the raw and stripped design that perfectly suits your Chief!

2-1 Exhaust concept


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