S&S Cycle Stealth Air Cleaner Kit — Without Cover, High-Flow Element — Gen 2 M8 (2023–2026)

S&S rebuilt the Stealth for the center-cooled Gen 2 Milwaukee-Eight: a larger throttle-body opening and the high-flow Stealth element behind it, for a measured 38% increase in airflow on S&S's bench. This is the base Gen 2 kit — polymer backplate, hardware, tank breather vent adapters, and the high-flow filter element. No cover is included: run your stock Gen 2 cover or any S&S Stealth cover.

FITMENT

Fits Harley-Davidson Gen 2 Milwaukee-Eight Touring models: 2023–2024 CVO Street Glide and CVO Road Glide, 2024–2026 Street Glide and Road Glide, 2025–2026 Road Glide 3, and 2026 Tri Glide (Drag Specialties application chart). These kits fit the Gen 2 center-cooled M8 only — they do not fit 2017–2023 first-generation M8 models or Twin Cam models.

Not sure it fits your bike? Email info@norcalbaggersupply.com — email is the fastest way to reach us — and we'll confirm before you order. You can also call 916-626-9030 (Mon–Fri, 9 AM–5 PM PT).

CALIFORNIA / CARB

California / CARB: S&S Cycle publishes CARB Executive Order D-355-50 for this part — it is exempt from emissions tampering regulations under that EO and is legal for sale and use in California on the models the Executive Order covers, as well as in all other states.

SPECIFICATIONS

• Manufacturer: S&S Cycle — part number 170-0803
• S&S Stealth air cleaner kit for Gen 2 Milwaukee-Eight models (S&S part #170-0803)
• Built-in stinger cone directs air smoothly into the throttle body bore and reduces turbulence (S&S)
• High-flow air filter element with increased filter area over stock (S&S)
• High-strength synthetic polymer backplate designed to reduce heat transfer to intake air (S&S)
• Made in the USA
• This is the base Gen 2 kit — polymer backplate, hardware, tank breather vent adapters, and the high-flow filter element. No cover is included: run your stock Gen 2 cover or any S&S Stealth cover.
• CARB Executive Order D-355-50 (S&S Cycle) — see the California note on this page
• 38% increase in airflow (S&S)
• Kit includes backplate, high-flow filter element, hardware, and tank breather vent adapters (S&S)

INSTALLATION

Air cleaner installation is a bolt-on job with basic hand tools: the stock air cleaner comes off and the S&S backplate, filter, and cover bolt on in its place. Follow the S&S instruction sheet included in the box for torque specs and breather routing. S&S publishes an official Stealth install video — it is embedded below.

QUESTIONS RIDERS ASK

What counts as a Gen 2 M8?
The center-cooled second-generation Milwaukee-Eight: 2023.5-up CVO Street Glide/Road Glide and the 2024-up Street Glide and Road Glide. If your M8 is a 2017–2023 model, you need the first-generation M8 Stealth kits instead.

What's in the box — is a cover included?
No cover is included. You get the backplate, high-flow filter element, hardware, and tank breather vent adapters — run your stock cover or pick any S&S Stealth cover.

Can you ship this to California?
Yes. S&S publishes CARB Executive Order D-355-50 for this part, so it is legal for sale and use in California on the models the EO covers — see the California note on this page.