S&S Cycle Air Cleaner Kits — Harley-Davidson

S&S Cycle Stealth air cleaner kit for 2017+ Harley-Davidson Milwaukee-Eight models with stock throttle body, featuring a high-strength synthetic polymer backplate to reduce intake air heat. Includes tri-spoke cover and actuator shroud that hides the throttle-by-wire servo for a clean install, and is 50-State legal.

Features

• High-strength synthetic polymer backplate reduces heat transfer
• Included actuator cover hides TBW servo motor
• Tri-Spoke Cover included
• Cooler, denser air improves cylinder fill and performance
• Compatible with stock Harley air cleaner cover (adapter required)
• 50-State legal, CARB EO# D-355-30
• High-flow filter option available

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 170-0392C
• Category: Air Intake Systems / Air Intake Components
• Weight: 3.2 lb

Fitment

Fits 2017 and newer Harley-Davidson Milwaukee-Eight models equipped with stock throttle body.

Frequently Asked Questions

Will this work with the stock Harley air cleaner cover?

Yes, with an adapter. S&S sells the adapter separately if you prefer the factory Harley look over the included tri-spoke cover.

Is this kit street legal and emissions compliant?

Yes — 50-State legal with CARB EO# D-355-30. Legal for street use nationwide.

What's the performance benefit of the polymer backplate?

The backplate reduces heat transfer to the incoming air, so the engine draws cooler, denser air for better fill and performance.

Does it hide the throttle-by-wire servo?

Yes — the included actuator cover conceals the TBW servo motor for a finished appearance.

Is a high-flow filter version available?

Yes — S&S offers a 1-inch taller high-flow filter option if you want maximum airflow.