aFe - Magnum FLOW Pro DRY S Air Filter - 21-90021

The aFe Power Magnum FLOW Pro DRY S air filter (part #21-90021) is a high-performance, oil-free replacement filter designed to deliver increased airflow with effective filtration. Featuring a washable and reusable synthetic media, this filter provides long service life and consistent performance without the need for oiling, making it ideal for both street and light-duty performance applications.

Key Features

• Pro DRY S synthetic media for high airflow and efficient filtration
• Oil-free design—no re-oiling required
• Washable and reusable for extended service life
• Designed to improve airflow and throttle response
• Direct replacement for compatible intake systems

Compatibility & Installation Notes

• Designed for use with compatible aFe Power intake systems
• Direct-fit replacement air filter
• Verify intake system and filter dimensions prior to ordering
• Installs using factory-style clamps or mounting hardware

Maintenance Notes

• Inspect filter regularly based on driving conditions
• Clean using mild soap and water or an approved aFe cleaning solution
• Allow filter to dry completely before reinstalling

Final Sale

This item is a Final Sale product and cannot be returned.

Prop 65 Warning

WARNING: This product can expose you to chemicals known to the State of California to cause cancer and reproductive harm. For more information, visit www.P65Warnings.ca.gov.