Dr. Jekill & Mr. Hyde - Adjustable Exhaust Systems for Harley-Davidson Motorcycles

Dr. Jekill & Mr. Hyde Electronically Adjustable Exhaust Systems. Made in the Netherlands. Covered by European & US patents.
The Jekill & Hyde Company has developed an electronically adjustable exhaust system that lets the driver choose between a stock Harley-Davidson sound,  and the world famous Harley-Davidson (louder) Rumble. The muffler contains an electronically adjustable butterfly valve. When the valve is closed,  the motorcycle produces about 85 db and gives out the same HP as the OEM mufflers. When you open the valve you not only gain about 15 % more  horsepower, but you also get up to 130db of deep thundering sound. The  noise control is not just as a result of either blocking or unblocking the escape of exhaust gases. When the valve is closed exhaust gas is diverted through a more restrictive passage inside the muffler. When the valve is open  the muffler becomes a straight through type muffler with a resulting deeper  and louder sound. You effectively have two different mufflers within the single  muffler body. Electronically adjustable exhaust systems are produced for all Harley Davidson models from 1984 up to 2007.
The internals of all units are 100% stainless steel. Only the highest quality materials available together with the best workmanship are used in these products which allows them to give customers  a two year full warranty on their electronically adjustable Dr Jekill & Mr Hyde exhaust system.              Installation Information
Mufflers have a universal mounting bracket that fits nearly  all H-D models. On some specific ones you only need to make a  small adjustment. Fitting advice available prior to purchase

Dr Jekill & Mr Hyde Electronically Adjustable Exhaust Systems - Dr Jekill & Mr Hyde Hot Rod Exhaust for Harley Davidson Night Rod Special

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Supershort! Only 300 mm
Nasty look, brutal sound!
Black ceramic coating finish

This exhaust system comes with:

Servo control unit (J & H BlackBox)
Servo motor
Inside Cable
Special heat resistant cable with lifetime warranty!
Connection cables
Assembly instructions

Dr Jekill & Mr Hyde Electronically Adjustable Exhaust Systems - Dr Jekill & Mr Hyde Nightrod Special Exhaust for Harley Davidson Nightrod Special

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This Jekill & Hyde black exhaust system makes the Night rod Special look even better.
Also available as 30 cm ultra short Hot rod.

Length 385 mm
Black ceramic coating finish

Exhaust systems comes with :

Servo control unit (J & H BlackBox)
Servo motor
Inside Cable
Special heat resistant cable with a lifetime warranty!
Connection cables
Instruction manual

Dr Jekill & Mr Hyde Electronically Adjustable Exhaust Systems - Dr Jekill & Mr Hyde Hotrod Exhaust for Harley Davidson V-Rod

Click the links below for more pictures

Picture 1 Picture 2

Super short exhaust system with Jekill & Hyde inside.
Length only 300 mm!
Chrome Plated finish.

This exhaust system comes with:

Servo control unit (J & H BlackBox)
Servo motor
Inside Cable
Special heat resistant cable with a lifetime warranty!
Connection cables
Assembly instructions

Dr Jekill & Mr Hyde Electronically Adjustable Exhaust Systems - Dr Jekill & Mr Hyde Restyling Project Exhaust for Harley Davidson V-Rod

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The Jekill & Hyde Company restyles your original V-Rod exhaust with J&H adjustable exhaust units “inside”.
The advantage is that the style of your V-Rod stays the same but the sound of the exhaust is electronically
adjustable from standard to approx. 130 dBa !
The Jekill & Hyde Company usually has a restyled V-Rod exhaust set in stock which makes it possible to
get a Dr. Jekill & Mr. Hyde version installed on the spot.

Dr Jekill & Mr Hyde Electronically Adjustable Exhaust Systems - Dr Jekill & Mr Hyde Hot Rod Big Shot Exhaust for Harley Davidson V-Rod

Super short exhaust system with Jekill & Hyde inside.

Chrome plated finish.

This exhaust system comes with:

Servo control unit (J & H BlackBox)
Servo motor
Inside Cable
Special heat resistant cable with a lifetime warranty!
Connection cables
Assembly instructions

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