Arlen Ness claims this is the best and simplest performance air cleaner kits for your Harley-period!
The Ness "Sucker" backing plate features a built-in carburetor support and built-in breather tunnels at each head to decrease crankcase pressure. Each tunnel exits at the mount of the carburetor to create a virtually closed-loop system. Breather features o-ring banjo bolt seals and a radiused intake manifold. No oil hoses, no oil fittings, no leaking and no mess! All kits include a "Big Sucker" aluminum backing plate, Team Ness High-Flow air filter, simple instructions and all necessary hardware. These kits are a "Stealth" design as they are used with the stock outer air filter cover.

Applications:
XL Sportster models 1988-2022 with standard OEM oval 2-bolt air cleaner cover: Use kit E
XL Sportster Seventy Two, Forty Eight and Iron 2016-2022 with standard OEM round 1-bolt air cleaner cover: Use kit B

Dyna 96CI and 103CI 2008-2017: Use kit C
Dyna 110CI FXDLS Low Rider S 2016-2017: Use kit A

Softail 2016-2017: Use kit A

Touring 2014-2016: Use kit A
Touring 107CI and 114CI 2017 to present, Touring 117CI 2018-2023: Use kit D

Trike 2014-2016: Use kit A
Trike 2017 to present: Use kit D

Note: European Softail 2007-2015, European Dyna 2007-2016 & European Touring 2007 are equipped with an Active Intake Sensor that must be removed when installing an aftermarket air cleaner. When you install a ZPN 702022 "Trick-Box", which is a plug-in module for the stock wiring harness, you avoid a warning light coming on at your dash.