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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.
Another unique feature of the Jekill And Hyde Company is the Restyling Division which specialises in converting and restyling OEM mufflers to incorporate the adjustable muffler system. Some of the mufflers we restyle are: Supertrapp, Harley Davidson V-Rod, Street-Rod, Night-Rod. Kess-Tech, Kerker, AMC and more.
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
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Dr. Jekill & Mr. Hyde Adjustable Exhaust Systems - Electronically Adjustable Super Shorty Exhaust Mufflers for Harley-Davidson, Chopper and Custom Motorcycle adjustable from standard up to 130 dB by bar mounted switch button in Polished Stainless Steel370 mm/14.5in long, Fits all custom bikes with a 2¼ inch = 57 mm connector. Stainless Steel Mirror Polish 684623 E Select your choice from the drop down list below and click 'Check Price'.  See Also: |
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Dr. Jekill & Mr. Hyde Adjustable Exhaust Systems - Electronically Adjustable Shorty Mufflers Exhaust for Harley-Davidson, Chopper and Custom Motorcycle adjustable from standard up to 130 dB by bar mounted switch button in Chrome finish410 mm/16in long, 1¾ inch = 44.5 mm inlet, Chrome finish 684622 E Select your choice from the drop down list below and click 'Check Price'. See Also: |
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Dr. Jekill & Mr. Hyde Adjustable Exhaust Systems - Electronically Adjustable Streetfighter Exhaust Mufflers for Harley-Davidson, Chopper and Custom Motorcycle adjustable from standard up to 130 dB by bar mounted switch button in Chrome finish 470 mm/18.5in long and 1¾ inch = 44.5 mm inlet, Chrome finish 684624 E All Sportster models, All Dyna models, All Softail deuce models Select your choice from the drop down list below and click 'Check Price'. See Also: |
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Dr. Jekill & Mr. Hyde Adjustable Exhaust Systems - 2 into 2 or 2 into 1 Supertrapp 445 Mufflers for Harley Davidson, Chopper and Custom Motorcycles in Polished Stainless Steel450 mm/17.5in long, Fits all custom bikes with a 2¼ inch = 57 mm connector. Stainless Steel Mirror Polish 684627 E Select your choice from the drop down list below and click 'Check Price'. See Also: |
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Dr. Jekill & Mr. Hyde Adjustable Exhaust Systems - Electronically Adjustable 2 into 1 and 2 into 2 Shorty Tapered Exhaust Mufflers for Harley-Davidson, Chopper and Custom Motorcycle adjustable up to 130 dB by bar mounted switch button in Chrome finish500 mm/19.7in, size equal to original H-D, 1¾ inch inlet, Chrome finish 684625 E Select your choice from the drop down list below and click 'Check Price'. See Also: |
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Dr. Jekill & Mr. Hyde Adjustable Exhaust Systems - Electronically Adjustable Streetfighter Tapered Exhaust Mufflers for Harley-Davidson, Chopper and Custom Motorcycle adjustable from standard up to 130 dB by bar mounted switch button in Chrome finish570 mm/22.5in long, 1¾ inch = 44.5 mm inlet, Chrome finish 684626 E Select your choice from the drop down list below and click 'Check Price'. See Also: |
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Dr. Jekill & Mr. Hyde Adjustable Exhaust Systems - Electronically Adjustable Classic Tapered Exhaust Mufflers for Harley-Davidson Roadking Motorcycle adjustable from standard up to 130 dB by bar mounted switch button in Chrome finish760 mm/30in long, 1¾ inch inlet, Chrome finish. All Roadking models 684630 E Select your choice from the drop down list below and click 'Check Price'. See Also: |
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Dr. Jekill & Mr. Hyde Adjustable Exhaust Systems - Electronically Adjustable Classic Streetfighter Exhaust Mufflers for Harley-Davidson Roadking Motorcycle adjustable from standard up to 130 dB by bar mounted switch button in Chrome finish640 mm/25in long, 1¾ inch inlet, Chrome finish. Shape is similar to #668620 but longer. All Roadking models 684635 E Select your choice from the drop down list below and click 'Check Price'. See Also: |
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Dr. Jekill & Mr. Hyde Adjustable Exhaust Systems - Electronically Adjustable Classic Fishtail Exhaust Mufflers for Harley-Davidson Roadking Motorcycle adjustable from standard up to 130 dB by bar mounted switch button in Chrome finish830 mm/32.7in long, 1¾ inch inlet, Chrome finish. All Roadking models 684676 E Select your choice from the drop down list below and click 'Check Price'. See Also: |
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Dr. Jekill & Mr. Hyde Adjustable Exhaust Systems - Thunderbolt Electronically Adjustable Exhaust System for Harley-Davidson, Chopper and Custom Motorcycle adjustable from standard up to 130 dB by bar mounted switch button in Polished Stainless Steel2¼ inch (set) Stainless Steel headerpipes & 2 x Supershorty incl. Fits all custom bikes. Picture shows system 684675E.........replace the mufflers on system with the mufflers shown above and below See Also: |
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Dr. Jekill & Mr. Hyde Adjustable Exhaust Systems - Electronically Adjustable Thunderbolt Exhaust System for Harley-Davidson, Chopper and Custom Motorcycle adjustable from standard up to 130 dB by bar mounted switch button in Polished Stainless Steel2¼ inch (set) Stainless steel headerpipes & 2 x Supertrapp 445 incl.Fits all custom bikes. If you need this system for very wide tyre RSD frames.......just ask 684675 E See Also: |
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Dr. Jekill & Mr. Hyde Adjustable Exhaust Systems - Electronically Adjustable Exhaust Restyling for Harley Davidson V Rod Motorcycles adjustable from standard up to 130 dB by bar mounted switch buttonAdditional shipping cost of sending system to Netherlands for modification. Retains original exhaust system and comes with the complete adjustable system installed See Also: |
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Dr. Jekill & Mr. Hyde Adjustable Exhaust Systems - Exhaust Restyling for Harley Davidson Street Rod Motorcycles adjustable from standard up to 130 dB by bar mounted switch buttonAdditional shipping cost of sending system to Netherlands for modification. Retains original exhaust system and comes with the complete adjustable system installed See Also: |
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Dr. Jekill & Mr. Hyde Adjustable Exhaust Systems - Electronically Adjustable Exhaust Restyling for Harley Davidson V Rod Motorcycles adjustable from standard up to 130 dB by bar mounted switch buttonAdditional shipping cost of sending system to Netherlands for modification. Retains original exhaust system and comes with the complete adjustable system installed See Also: |
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Dr. Jekill & Mr. Hyde Adjustable Exhaust Systems - Polished Stainless Steel Thunderbolt Header Pipes for Harley-Davidson, Chopper and Custom Motorcycles made from 2-1/4in dia x 14 gauge tubeHeaderpipes 2¼ Inch ( Set ) Stainless Steel Polished ( model Thunderbolt ) See Also: |
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Dr. Jekill & Mr. Hyde Adjustable Exhaust Systems - Polished Stainless Steel Right Side Drive Thunderbolt Header Pipes for Harley Davidson, Chopper and Custom Motorcycles made from 2-1/4in dia x 14 gauge tubeHeaderpipes 2¼ Inch ( Set ) Stainless Steel Polished ( model Thunderbolt ) See Also: |
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Dr Jekill & Mr Hyde Adjustable Exhaust Systems - Exhaust Restyling for Harley Davidson NightRod Motorcycles adjustable from standard up to 130 dB by bar mounted switch button |
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