AEM Drop In Replacement Air Filter (28-50092) | Subaru STI 2019-2021

The AEM Drop-In Replacement Air Filter is designed for 2019–2021 Subaru STI models, providing improved airflow and reliable filtration while retaining the factory airbox. Built with AEM’s oil-free DryFlow synthetic media, this drop-in filter helps support consistent engine performance and throttle response without the maintenance concerns associated with oiled filters.

KEY FEATURES

• Direct drop-in replacement for the factory Subaru air filter
• Oil-free DryFlow synthetic filter media delivers high airflow with effective filtration
• Washable and reusable design allows long service life and easy maintenance
• No oil required, helping prevent contamination of the MAF sensor
• Designed to maintain OEM fitment while supporting improved airflow

TECHNICAL SPECIFICATIONS

• Filter Media: AEM DryFlow oil-free synthetic material
• Application Type: Drop-in replacement air filter for factory airbox
• Maintenance: Washable and reusable; no oil required
• Installation: Direct replacement using OEM mounting location
• Performance Benefit: Supports consistent airflow and throttle response while maintaining engine protection

VEHICLE FITMENT

• Subaru STI 2019–2021

AEM Induction engineers high-performance air intake systems, filters, and airflow solutions designed to increase power, improve throttle response, and deliver reliable performance through advanced materials and proven engineering.