aFe MagnumFLOW Air Filter — Fits Subaru Impreza WRX STI 2008-2011

SKU: AFE31-10161
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About aFe aFe Power is the racing-bred air, exhaust, and ...Read More

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Sale price$84.99
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About aFe

aFe Power is the racing-bred air, exhaust, and intercooler brand. From Magnum FORCE intakes to ATLAS exhausts and BladeRunner intercoolers, every aFe product is dyno-tuned for measurable HP and torque gains on Ford, GM, Ram, and import platforms.

Watch in action

aFe MagnumFLOW OE Replacement Air Filter for Subaru Impreza WRX STI

Upgrade your Subaru Impreza WRX STI (2008-2011, H4-2.5L engine) with the high-performance aFe MagnumFLOW OE Replacement Air Filter (Part # 31-10161). This filter is engineered to deliver exceptional airflow and filtration, ensuring your turbocharged engine receives clean, unrestricted air for optimal performance.

Superior Filtration and Airflow:

  • Three-Layer Progressive Synthetic Media: Captures a wide range of contaminants while allowing maximum airflow. This dry, non-oiled media is designed for convenience and long service life.
  • Washable and Reusable: Offers an eco-friendly and cost-effective solution, allowing for multiple cleaning cycles to maintain peak performance.
  • Durable Polyurethane Frame: The 100-percent polyurethane boxed frame provides a robust and secure fit, ensuring longevity and resistance to cracking or degradation.
  • Integrated Urethane Bump Seal: Creates a perfect, leak-free seal between the filter and the airbox, preventing dirt and debris from bypassing the filtration media.
  • OE Replacement Fitment: Designed as a direct replacement for your factory air filter, making installation straightforward and hassle-free.

Engineered for Performance:

The tall, evenly spaced pleats of the MagnumFLOW filter maximize the filter's surface area, significantly increasing its dust-holding capacity and extending service intervals. This design ensures that your WRX STI's engine breathes easier, leading to improved throttle response and sustained power delivery. The non-oiled nature of the media eliminates the risk of over-oiling, which can damage sensitive sensors in modern engines.

Maintain the integrity and performance of your Subaru's engine with this premium air filter from aFe Power. It's an essential component for any performance-oriented build or routine maintenance. Get yours today at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2006-2007 Subaru B9 Tribeca Base
2006-2007 Subaru B9 Tribeca Limited
2016-2017 Subaru Crosstrek Base
2016-2017 Subaru Crosstrek Limited
2016-2017 Subaru Crosstrek Premium
2008 Subaru Forester X L.L. Bean Edition
2009 Subaru Forester XT
2009-2010 Subaru Forester XT Limited
2009-2013 Subaru Forester X Limited
2009-2013 Subaru Forester X Premium
2009-2013 Subaru Forester X
2010-2013 Subaru Forester XT Premium
2011-2013 Subaru Forester X Touring
2011-2013 Subaru Forester XT Touring
2014-2018 Subaru Forester 2.0XT Premium
2014-2018 Subaru Forester 2.0XT Touring
2014-2018 Subaru Forester 2.5i
2014-2018 Subaru Forester 2.5i Limited
2014-2018 Subaru Forester 2.5i Premium
2014-2018 Subaru Forester 2.5i Touring
2008-2011 Subaru Impreza 2.5i
2008-2011 Subaru Impreza Outback Sport
2008-2014 Subaru Impreza WRX STI
2008-2014 Subaru Impreza WRX
2009-2010 Subaru Impreza 2.5 GT
2009-2014 Subaru Impreza WRX Premium
2010 Subaru Impreza WRX STI Special Edition
2010-2011 Subaru Impreza 2.5i Premium
2010-2014 Subaru Impreza WRX Limited
2011-2014 Subaru Impreza WRX STI Limited
2012-2016 Subaru Impreza Sport Limited
2012-2016 Subaru Impreza Sport Premium
2012-2018 Subaru Impreza Base
2012-2018 Subaru Impreza Limited
2012-2018 Subaru Impreza Premium
2017-2018 Subaru Impreza Sport
2005 Subaru Legacy GT Limited
2005 Subaru Legacy i
2005 Subaru Legacy Limited
2005-2006 Subaru Legacy GT
2006-2009 Subaru Legacy GT spec.B
2006-2019 Subaru Legacy 2.5i
2007-2009 Subaru Legacy 2.5i Special Edition
2007-2009 Subaru Legacy GT Limited
2007-2019 Subaru Legacy 2.5i Limited
2008-2009 Subaru Legacy 3.0 R Limited
2009 Subaru Legacy 3.0 R
2010-2012 Subaru Legacy 2.5GT
2010-2012 Subaru Legacy 3.6R Premium
2010-2013 Subaru Legacy 3.6R
2010-2019 Subaru Legacy 2.5i Premium
2010-2019 Subaru Legacy 3.6R Limited
2014 Subaru Legacy 2.5i Sport
2017-2019 Subaru Legacy 2.5i Sport
2005 Subaru Outback VDC Limited
2005 Subaru Outback i
2005 Subaru Outback Limited
2005-2006 Subaru Outback XT
2005-2006 Subaru Outback R
2005-2008 Subaru Outback R L.L. Bean Edition

…and 30 additional fitments. Contact us to confirm yours.

Product Details

Product Description
Part Numbers
Sizing & Fit

About aFe

aFe Power is the racing-bred air, exhaust, and intercooler brand. From Magnum FORCE intakes to ATLAS exhausts and BladeRunner intercoolers, every aFe product is dyno-tuned for measurable HP and torque gains on Ford, GM, Ram, and import platforms.

Watch in action

aFe MagnumFLOW OE Replacement Air Filter for Subaru Impreza WRX STI

Upgrade your Subaru Impreza WRX STI (2008-2011, H4-2.5L engine) with the high-performance aFe MagnumFLOW OE Replacement Air Filter (Part # 31-10161). This filter is engineered to deliver exceptional airflow and filtration, ensuring your turbocharged engine receives clean, unrestricted air for optimal performance.

Superior Filtration and Airflow:

  • Three-Layer Progressive Synthetic Media: Captures a wide range of contaminants while allowing maximum airflow. This dry, non-oiled media is designed for convenience and long service life.
  • Washable and Reusable: Offers an eco-friendly and cost-effective solution, allowing for multiple cleaning cycles to maintain peak performance.
  • Durable Polyurethane Frame: The 100-percent polyurethane boxed frame provides a robust and secure fit, ensuring longevity and resistance to cracking or degradation.
  • Integrated Urethane Bump Seal: Creates a perfect, leak-free seal between the filter and the airbox, preventing dirt and debris from bypassing the filtration media.
  • OE Replacement Fitment: Designed as a direct replacement for your factory air filter, making installation straightforward and hassle-free.

Engineered for Performance:

The tall, evenly spaced pleats of the MagnumFLOW filter maximize the filter's surface area, significantly increasing its dust-holding capacity and extending service intervals. This design ensures that your WRX STI's engine breathes easier, leading to improved throttle response and sustained power delivery. The non-oiled nature of the media eliminates the risk of over-oiling, which can damage sensitive sensors in modern engines.

Maintain the integrity and performance of your Subaru's engine with this premium air filter from aFe Power. It's an essential component for any performance-oriented build or routine maintenance. Get yours today at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2006-2007 Subaru B9 Tribeca Base
2006-2007 Subaru B9 Tribeca Limited
2016-2017 Subaru Crosstrek Base
2016-2017 Subaru Crosstrek Limited
2016-2017 Subaru Crosstrek Premium
2008 Subaru Forester X L.L. Bean Edition
2009 Subaru Forester XT
2009-2010 Subaru Forester XT Limited
2009-2013 Subaru Forester X Limited
2009-2013 Subaru Forester X Premium
2009-2013 Subaru Forester X
2010-2013 Subaru Forester XT Premium
2011-2013 Subaru Forester X Touring
2011-2013 Subaru Forester XT Touring
2014-2018 Subaru Forester 2.0XT Premium
2014-2018 Subaru Forester 2.0XT Touring
2014-2018 Subaru Forester 2.5i
2014-2018 Subaru Forester 2.5i Limited
2014-2018 Subaru Forester 2.5i Premium
2014-2018 Subaru Forester 2.5i Touring
2008-2011 Subaru Impreza 2.5i
2008-2011 Subaru Impreza Outback Sport
2008-2014 Subaru Impreza WRX STI
2008-2014 Subaru Impreza WRX
2009-2010 Subaru Impreza 2.5 GT
2009-2014 Subaru Impreza WRX Premium
2010 Subaru Impreza WRX STI Special Edition
2010-2011 Subaru Impreza 2.5i Premium
2010-2014 Subaru Impreza WRX Limited
2011-2014 Subaru Impreza WRX STI Limited
2012-2016 Subaru Impreza Sport Limited
2012-2016 Subaru Impreza Sport Premium
2012-2018 Subaru Impreza Base
2012-2018 Subaru Impreza Limited
2012-2018 Subaru Impreza Premium
2017-2018 Subaru Impreza Sport
2005 Subaru Legacy GT Limited
2005 Subaru Legacy i
2005 Subaru Legacy Limited
2005-2006 Subaru Legacy GT
2006-2009 Subaru Legacy GT spec.B
2006-2019 Subaru Legacy 2.5i
2007-2009 Subaru Legacy 2.5i Special Edition
2007-2009 Subaru Legacy GT Limited
2007-2019 Subaru Legacy 2.5i Limited
2008-2009 Subaru Legacy 3.0 R Limited
2009 Subaru Legacy 3.0 R
2010-2012 Subaru Legacy 2.5GT
2010-2012 Subaru Legacy 3.6R Premium
2010-2013 Subaru Legacy 3.6R
2010-2019 Subaru Legacy 2.5i Premium
2010-2019 Subaru Legacy 3.6R Limited
2014 Subaru Legacy 2.5i Sport
2017-2019 Subaru Legacy 2.5i Sport
2005 Subaru Outback VDC Limited
2005 Subaru Outback i
2005 Subaru Outback Limited
2005-2006 Subaru Outback XT
2005-2006 Subaru Outback R
2005-2008 Subaru Outback R L.L. Bean Edition

…and 30 additional fitments. Contact us to confirm yours.

Product Details

Product Description

About aFe

aFe Power is the racing-bred air, exhaust, and intercooler brand. From Magnum FORCE intakes to ATLAS exhausts and BladeRunner intercoolers, every aFe product is dyno-tuned for measurable HP and torque gains on Ford, GM, Ram, and import platforms.

Watch in action

aFe MagnumFLOW OE Replacement Air Filter for Subaru Impreza WRX STI

Upgrade your Subaru Impreza WRX STI (2008-2011, H4-2.5L engine) with the high-performance aFe MagnumFLOW OE Replacement Air Filter (Part # 31-10161). This filter is engineered to deliver exceptional airflow and filtration, ensuring your turbocharged engine receives clean, unrestricted air for optimal performance.

Superior Filtration and Airflow:

  • Three-Layer Progressive Synthetic Media: Captures a wide range of contaminants while allowing maximum airflow. This dry, non-oiled media is designed for convenience and long service life.
  • Washable and Reusable: Offers an eco-friendly and cost-effective solution, allowing for multiple cleaning cycles to maintain peak performance.
  • Durable Polyurethane Frame: The 100-percent polyurethane boxed frame provides a robust and secure fit, ensuring longevity and resistance to cracking or degradation.
  • Integrated Urethane Bump Seal: Creates a perfect, leak-free seal between the filter and the airbox, preventing dirt and debris from bypassing the filtration media.
  • OE Replacement Fitment: Designed as a direct replacement for your factory air filter, making installation straightforward and hassle-free.

Engineered for Performance:

The tall, evenly spaced pleats of the MagnumFLOW filter maximize the filter's surface area, significantly increasing its dust-holding capacity and extending service intervals. This design ensures that your WRX STI's engine breathes easier, leading to improved throttle response and sustained power delivery. The non-oiled nature of the media eliminates the risk of over-oiling, which can damage sensitive sensors in modern engines.

Maintain the integrity and performance of your Subaru's engine with this premium air filter from aFe Power. It's an essential component for any performance-oriented build or routine maintenance. Get yours today at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2006-2007 Subaru B9 Tribeca Base
2006-2007 Subaru B9 Tribeca Limited
2016-2017 Subaru Crosstrek Base
2016-2017 Subaru Crosstrek Limited
2016-2017 Subaru Crosstrek Premium
2008 Subaru Forester X L.L. Bean Edition
2009 Subaru Forester XT
2009-2010 Subaru Forester XT Limited
2009-2013 Subaru Forester X Limited
2009-2013 Subaru Forester X Premium
2009-2013 Subaru Forester X
2010-2013 Subaru Forester XT Premium
2011-2013 Subaru Forester X Touring
2011-2013 Subaru Forester XT Touring
2014-2018 Subaru Forester 2.0XT Premium
2014-2018 Subaru Forester 2.0XT Touring
2014-2018 Subaru Forester 2.5i
2014-2018 Subaru Forester 2.5i Limited
2014-2018 Subaru Forester 2.5i Premium
2014-2018 Subaru Forester 2.5i Touring
2008-2011 Subaru Impreza 2.5i
2008-2011 Subaru Impreza Outback Sport
2008-2014 Subaru Impreza WRX STI
2008-2014 Subaru Impreza WRX
2009-2010 Subaru Impreza 2.5 GT
2009-2014 Subaru Impreza WRX Premium
2010 Subaru Impreza WRX STI Special Edition
2010-2011 Subaru Impreza 2.5i Premium
2010-2014 Subaru Impreza WRX Limited
2011-2014 Subaru Impreza WRX STI Limited
2012-2016 Subaru Impreza Sport Limited
2012-2016 Subaru Impreza Sport Premium
2012-2018 Subaru Impreza Base
2012-2018 Subaru Impreza Limited
2012-2018 Subaru Impreza Premium
2017-2018 Subaru Impreza Sport
2005 Subaru Legacy GT Limited
2005 Subaru Legacy i
2005 Subaru Legacy Limited
2005-2006 Subaru Legacy GT
2006-2009 Subaru Legacy GT spec.B
2006-2019 Subaru Legacy 2.5i
2007-2009 Subaru Legacy 2.5i Special Edition
2007-2009 Subaru Legacy GT Limited
2007-2019 Subaru Legacy 2.5i Limited
2008-2009 Subaru Legacy 3.0 R Limited
2009 Subaru Legacy 3.0 R
2010-2012 Subaru Legacy 2.5GT
2010-2012 Subaru Legacy 3.6R Premium
2010-2013 Subaru Legacy 3.6R
2010-2019 Subaru Legacy 2.5i Premium
2010-2019 Subaru Legacy 3.6R Limited
2014 Subaru Legacy 2.5i Sport
2017-2019 Subaru Legacy 2.5i Sport
2005 Subaru Outback VDC Limited
2005 Subaru Outback i
2005 Subaru Outback Limited
2005-2006 Subaru Outback XT
2005-2006 Subaru Outback R
2005-2008 Subaru Outback R L.L. Bean Edition

…and 30 additional fitments. Contact us to confirm yours.

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