Uni Filter NU-3409 Vintage Foam Air Filter for Harley-Davidson Sprint 250/360

The Uni Filter NU-3409 is a vintage-application foam air filter engineered for Harley-Davidson Sprint 250 and 360 motorcycles. Purpose-built for classic pre-1980 bikes, this filter restores proper engine breathing to keep your vintage machine running at its best.

Manufactured from open-cell polyurethane foam, the NU-3409 delivers the high airflow and superior dirt-trapping performance that Uni Filter has been known for since 1969. The foam construction allows the filter to hold significant amounts of debris while maintaining strong airflow — protecting your engine without sacrificing performance.

Key Features:

• Open-cell polyurethane foam construction for maximum airflow and filtration
• Designed specifically for vintage Harley-Davidson Sprint 250 and 360 models
• Direct OEM-style replacement — fits the stock airbox with no modifications required
• Reusable and washable — clean with a grease-cutting dish soap, re-oil, and reinstall
• Made in the USA
• Sold individually

Important: This filter does not fit the Harley-Davidson 350SS or 250SS models, which require a smaller filter. For best results and proper filtration performance, treat the foam element with Uni Filter Oil before installation. Uni Filter Cleaner is recommended for periodic maintenance.