S&S Cycle Air Cleaner Kits — Harley-Davidson

S&S Cycle Stealth air cleaner kit for Harley-Davidson, featuring a high-strength synthetic polymer backplate and increased filter area that delivers 38% more airflow for cooler, denser combustion charge and measurable power gains. Designed to reduce heat transfer to intake air while maintaining 50-state legal compliance.

Features

• High-strength synthetic polymer backplate reduces heat transfer
• 38% increase in airflow vs. stock
• Washable, reusable filter element
• 1" taller high-flow filter option available (part 170-0127)
• Pre-filters available for extended service intervals
• CARB EO# D-355-50 exempt from emissions tampering rules
• Easy installation

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 170-0394C
• Weight: 3.2 lb
• Category: Air Intake Systems / Air Intake Components

Fitment

Fits Harley-Davidson models. Verify your specific year and model before ordering.

Frequently Asked Questions

How much horsepower will I gain from this air cleaner?

Power gains depend on tuning and engine mods. This cleaner alone typically delivers 3-8 hp on stock engines; gains are greater with fuel mapping.

Is this street legal in all 50 states?

Yes — S&S Stealth holds CARB EO# D-355-50, making it exempt from emissions tampering rules nationwide.

Can I wash and reuse the filter element?

Yes. The filter is washable and reusable; pre-filters are also available to extend service life between cleanings.

Do I need a custom cover, or does it fit under the stock air cleaner cover?

Multiple cover options are available depending on your bike. Check the S&S website or contact your dealer to confirm the right fit for your model.

Will this require a fuel tuner or ECU flash?

A tuner is not required for the stock airbox setup, but fuel mapping will maximize the power benefits of increased airflow.