Perrin X-PSP-INT-208 3.125in Replacement Foam Air Filter for Subaru WRX/STI AWD

Vehicle Fitment

• 2002-2007 Subaru WRX (GD, 2.0L H4 Turbo, AWD) - with PERRIN intake system
• 2004-2007 Subaru STI (GD, 2.5L H4 Turbo, AWD) - with PERRIN intake system
• 2022-2026 Subaru WRX (VB, 2.4L H4 Turbo, AWD) - with PERRIN intake system

Fitment Notes

• Direct replacement for most PERRIN Performance Subaru intake systems, including Big MAF and V2 standard intakes
• Also fits any intake system with a 3.125" inner diameter filter mouth
• Not compatible with the 2008-2014 WRX/STI Cold Air Intake (PSP-INT-322) - that intake uses the 2.75" filter (X-PSP-INT-324-2)
• Filter inlet inner diameter (I.D.) is 3.125" - verify your intake's inlet size before ordering

Features

• Open-cell reticulated polyurethane foam construction for minimal airflow restriction
• Pre-oiled with specially formulated filter oil - ready to install straight out of the box
• Two-piece design allows the foam sleeve to be removed separately for easy cleaning
• Washable and reusable - rinse under a faucet, wring out, re-oil, and reinstall
• Foam grabs and retains dirt rather than blocking it, maintaining airflow as the filter loads
• Compatible with PERRIN Big MAF and V2 standard intake systems
• Superior dust holding capacity compared to standard paper filter elements
• Backed by PERRIN Performance's 5-year warranty

Specifications

• Mouth Inner Diameter (I.D.): 3.125"
• Filter Type: Open Cell Foam, Oiled
• Design: Two-Piece (removable foam element)
• Condition: Pre-Oiled
• Warranty: 5 Years

Included Components

• 1x PERRIN Replacement Foam Air Filter (pre-oiled)

Product Description

The PERRIN X-PSP-INT-208 is a replacement open-cell foam air filter designed for PERRIN Performance intake systems on the 2002-2007 Subaru WRX, 2004-2007 Subaru STI, and 2022-2026 Subaru WRX. It serves as a direct replacement for most PERRIN Subaru intakes, including the Big MAF and V2 standard systems, and will also work with any third-party intake that accepts a 3.125" inner diameter filter. The oiled foam construction captures and retains dust and debris throughout its open-cell matrix, maintaining strong airflow even as the filter accumulates dirt over time.

The two-piece design makes cleaning straightforward - remove the foam sleeve from the rigid filter frame, rinse it under water, wring it out, re-oil, and reinstall. Because it is washable and reusable, this filter can last the life of the vehicle with routine maintenance. Note that this filter is not compatible with the 2008-2014 WRX/STI Cold Air Intake (PSP-INT-322), which requires the 2.75" version (X-PSP-INT-324-2). Always verify your intake's inlet sizing before ordering to confirm proper fitment.