Built to order
Each system is made to your configuration by Dr. Jekill & Mr. Hyde and typically reaches us in 3 weeks, up to 6. We email you the moment it is dispatched from Leeds.
£250+ Dr. Jekill & Mr. Hyde
Dr. Jekill & Mr. Hyde make electronically adjustable exhaust systems: one exhaust, several sound modes, switched from the handlebar with the Modeswitch control. Each system is built by the Jekill & Hyde Company in the Netherlands for a specific motorcycle, so every product on this page is a complete configuration — body, end cap, control and, where the bike needs one, header set — listed against the models and years it fits.
We carry the full range for Harley-Davidson, Indian, BMW and Triumph. Use the manufacturer filter to narrow the page to your make, then the model and year in each product's fitment table. Every listing shows the system on the bike it is configured for, together with the manufacturer's own sound check for that model family.
Built to order
These exhausts do not exist until you order them. Dr. Jekill & Mr. Hyde build each one to the configuration you choose and it typically reaches us in 3 weeks, up to 6; once it arrives in Leeds it is dispatched like any other order. Because each system is made to your specification, it cannot be returned for change of mind once manufacturing has started — faulty or not-as-described items are covered as normal. We confirm your bike's model and year with you before we place the order.
Ordering from Iron City Motorcycles
Prices are the manufacturer's UK prices including VAT, with free UK delivery on every system. Use code JH5 at checkout for 5% off your first Dr. Jekill & Mr. Hyde order. Details of each system's approvals, sound modes and warranty are as published by the manufacturer for that model; we do not add claims of our own.
Ordering a Dr. Jekill & Mr. Hyde exhaust from Iron City
Made to your spec
No change-of-mind returns once manufacturing has started. Faulty or not-as-described items are covered as normal; your statutory rights are unaffected.
4-year manufacturer warranty
Dr. Jekill & Mr. Hyde's standard warranty is 4 years. A 5-year extended warranty is available — ask when you order.
5% off with code JH5
One use per customer, on any Dr. Jekill & Mr. Hyde order. Free UK delivery on every system.
How the adjustable valve works — the manufacturer's own animation
Dr. Jekill & Mr. Hyde — questions before you order
How long will my exhaust take?
Every Dr. Jekill & Mr. Hyde system is built to order. The manufacturer typically delivers to us in 3 weeks, and up to 6. Once it arrives in Leeds it is dispatched like any other order, and we email you when it leaves. Our order tracker will not show progress until the exhaust reaches Leeds.
Can I return it if I change my mind?
No. Each system is made to your specification, so it cannot be returned or cancelled for change of mind once manufacturing has started. Faulty or not-as-described items are covered as normal and your statutory rights are unaffected. We confirm your bike's model and year with you before we place the order.
Which system fits my bike?
Use the filters to pick your make and then your model family; every listing shows the exact models and years it fits, together with the manufacturer's notes for that bike. If your bike is not listed, or you want a combination of body, end cap and finish you cannot see, contact us — we order to your configuration.
What are the sound modes?
Dr. Jekill & Mr. Hyde's system has a valve in the silencer, moved by the handlebar Modeswitch. The manufacturer names three modes: Dr. Jekill (valve closed), Dynamic (valve half open) and Mr. Hyde (valve fully open). On motorcycles without CAN bus the Blackbox version offers two modes, Dr. Jekill and Mr. Hyde. Each product page carries the manufacturer's sound check for that model family.
Is it road legal?
Dr. Jekill & Mr. Hyde describe the system as "a completely legal exhaust system that complies with European laws and is ECE, EG-BE and TÜV approved" (jekillandhyde.com). Approvals are as published by the manufacturer for each model — check the product page and the manufacturer's site for your bike; we do not add claims of our own.
What is the warranty?
The manufacturer's standard warranty is 4 years. Dr. Jekill & Mr. Hyde also offer a 5-year extended warranty; ask us when you order and we will add it to your configuration.
How do I use the 5% code?
Enter JH5 at checkout. It is valid once per customer on any Dr. Jekill & Mr. Hyde order and cannot be combined with other codes.