Twenty-One Wrinkle Black exhaust by Dr. Jekill & Mr. Hyde. Choose your end cap and the finish of the header set on this page — Dr. Jekill & Mr. Hyde build this exhaust to the combination you select. Each combination has its own SKU, shown as the SKU of your selection: the exhaust's EP part number followed by the header set's HE part number.

End caps

24 configurations are offered for this exhaust, from £3059.81.

End cap	Header set	Price	SKU
4.7 inch Streetfighter Blank	21 Full Forward Narrow Brushed	£3059.81	EP-252872+HE-001648
4.7 inch Slashcut Blank	21 Full Forward Narrow Brushed	£3085.81	EP-252869+HE-001648
4.7 inch Slashcut Wrinkle Black	21 Full Forward Narrow Brushed	£3085.81	EP-252870+HE-001648
4.7 inch Slashcut Bronze	21 Full Forward Narrow Brushed	£3085.81	EP-252871+HE-001648
4.7 inch Streetfighter Wrinkle Black	21 Full Forward Narrow Brushed	£3085.81	EP-252873+HE-001648
4.7 inch Streetfighter Bronze	21 Full Forward Narrow Brushed	£3085.81	EP-252874+HE-001648
4.7 inch Streetfighter Blank	21 Full Mid Narrow Brushed	£3059.81	EP-252872+HE-001649
4.7 inch Slashcut Blank	21 Full Mid Narrow Brushed	£3085.81	EP-252869+HE-001649
4.7 inch Slashcut Wrinkle Black	21 Full Mid Narrow Brushed	£3085.81	EP-252870+HE-001649
4.7 inch Slashcut Bronze	21 Full Mid Narrow Brushed	£3085.81	EP-252871+HE-001649
4.7 inch Streetfighter Wrinkle Black	21 Full Mid Narrow Brushed	£3085.81	EP-252873+HE-001649
4.7 inch Streetfighter Bronze	21 Full Mid Narrow Brushed	£3085.81	EP-252874+HE-001649
4.7 inch Streetfighter Blank	21 Full Forward Narrow Wrinkle Black	£3167.81	EP-252872+HE-611648
4.7 inch Slashcut Blank	21 Full Forward Narrow Wrinkle Black	£3193.81	EP-252869+HE-611648
4.7 inch Slashcut Wrinkle Black	21 Full Forward Narrow Wrinkle Black	£3193.81	EP-252870+HE-611648
4.7 inch Slashcut Bronze	21 Full Forward Narrow Wrinkle Black	£3193.81	EP-252871+HE-611648
4.7 inch Streetfighter Wrinkle Black	21 Full Forward Narrow Wrinkle Black	£3193.81	EP-252873+HE-611648
4.7 inch Streetfighter Bronze	21 Full Forward Narrow Wrinkle Black	£3193.81	EP-252874+HE-611648
4.7 inch Streetfighter Blank	21 Full Mid Narrow Wrinkle Black	£3167.81	EP-252872+HE-611649
4.7 inch Slashcut Blank	21 Full Mid Narrow Wrinkle Black	£3193.81	EP-252869+HE-611649
4.7 inch Slashcut Wrinkle Black	21 Full Mid Narrow Wrinkle Black	£3193.81	EP-252870+HE-611649
4.7 inch Slashcut Bronze	21 Full Mid Narrow Wrinkle Black	£3193.81	EP-252871+HE-611649
4.7 inch Streetfighter Wrinkle Black	21 Full Mid Narrow Wrinkle Black	£3193.81	EP-252873+HE-611649
4.7 inch Streetfighter Bronze	21 Full Mid Narrow Wrinkle Black	£3193.81	EP-252874+HE-611649

The photographs are Dr. Jekill & Mr. Hyde's own of this system. They publish no rendered image of it with each end cap, so the picture does not change with the cap you choose — the part number does, and that is what we order against.

Header set

On the Harley-Davidson Low Rider ST, Low Rider S & Street Bob 2025–2026 Dr. Jekill & Mr. Hyde supply the Twenty-One Wrinkle Black only with their Twenty-One header set. It replaces the stock headers, so it is part of every configuration on this page; you choose its finish here — 21 Full Forward Narrow Brushed, 21 Full Mid Narrow Brushed, 21 Full Forward Narrow Wrinkle Black or 21 Full Mid Narrow Wrinkle Black. Forward and Mid refer to your bike's control position; choose the one that matches your footpegs.

Fitment

Make and family	Models and years
Harley-Davidson Softail	Low Rider S 2025–2026, Low Rider ST 2025–2026, Street Bob 2025–2026

Fitment is by model and year as published by the manufacturer. We confirm your bike's model and year with you before placing the order.

Please note

This model is suitable for A1 + A2 (35kW)
Attention: To keep the Low Rider ST cases with a V-Strike or Twenty-One header, select the Low Rider ST case lift kit under Accessories.

Built to order

This exhaust does not exist until you order it. Dr. Jekill & Mr. Hyde build it to this specification after you order, and it typically reaches us in 3 weeks, up to 6. Because it is made to your specification it cannot be returned or cancelled for change of mind once manufacturing has started; if it arrives faulty or not as described, your statutory rights are unaffected. Once it arrives with us in Leeds it is dispatched like any other order.

Specification

Brand	Dr. Jekill & Mr. Hyde
Exhaust	Twenty-One Wrinkle Black
Manufacturer part number	Depends on the end cap and header set chosen — shown as the SKU of your selection
Control	Modeswitch
Lead time	Typically 3 weeks, up to 6 weeks