aFe Power Direct Fit Magnum Pro Dry S Performance Drop-In Air Filter (31-10161) | Subaru WRX 2008-2018 / STI 2008-2018

The aFe Direct Fit Magnum Pro Dry S Performance Drop-In Air Filter is designed to improve airflow and filtration efficiency while serving as a direct replacement for the factory air filter on Subaru WRX 2008–2018 and Subaru STI 2008–2018 applications. Built for performance-focused drivers, this oil-free filter enhances throttle response and overall engine efficiency while retaining the factory airbox.

KEY FEATURES

• Direct replacement drop-in air filter for the factory airbox
• Magnum Pro Dry S oil-free filter media delivers improved airflow and filtration
• No oiling required for easy maintenance and consistent performance
• Washable and reusable design for long service life
• Improves throttle response and overall engine breathing

TECHNICAL SPECIFICATIONS

• Filter Type: Drop-in replacement air filter
• Filter Media: aFe Magnum Pro Dry S (oil-free)
• Installation: Direct replacement for OEM air filter
• Maintenance: Washable and reusable
• Application: Factory airbox performance upgrade

VEHICLE FITMENT

• Subaru WRX 2008–2018
• Subaru STI 2008–2018

aFe Power engineers performance intake, filtration, and exhaust solutions designed to increase airflow, improve engine efficiency, and deliver proven gains for street, performance, and motorsports applications.