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VEHICLE: Subaru, STi
, 2004 - 2007 SELECTIONS: Products : Intakes: Drop In Replacement Air Filters

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Apexi Panel Filter $ 30.00 Fitment 2002-2007 WRX/STI 1994-1998- Legacy GT 2004-2008 Forester XT The Apexi Power Intake Panel Filter is a stock replacement air filter. Increase airflow over the stock filter with this maintenance free dry filter. ...(MORE) Cobb SF Intake Filter $ 50.00 Fitment WRX 2002-2007 STI 2004-2007 Forester 2004-2006 Legacy 2005-2009 Mazda 3 2007-2010 Replacement filter for your COBB SF Intake. The custom conical cloth filter feeds filtered air directly to the engine, while maintaining optimal intake velocity and minimizing turbulence found with many aftermarket intake systems. ...(MORE) K&N Placement Filter $ 39.50 FITMENT: Legacy GT 1993-2009 WRX 2002-2007 STI 2004-2007 Forester XT 1993-2009 Improve airflow and increase your engines efficency by replacing the factory air filter with a high flow filter. K&N's Legacy GT replacement air filters are designed to increase horsepower and acceleration...(MORE) Perrin High Flow Foam Filter $ 35.99 Fitment 2002-2007 WRX 2004-2007 STI 2005-2009 Legacy GT 2004-2008 Forester XT Add Horsepower and torque without replacing the entire factory air box assembly. Perrin's dual stage foam drop in panel filter provides maximum power gains while removing harmful particulates. Higher flow rates...(MORE)