Agency Power AP-GDA-171 Stainless Steel Downpipe Subaru WRX/STI 2.0L/2.5L Image1

Agency Power Stainless Steel Downpipe Subaru WRX/STI 2.0L/2.5L

  • Full Stainless Steel

  • Includes Gaskets

  • Direct Bolt On

Product Details

Continually developing and enhancing the Subaru WRX and STI cars has been the goal of Agency Power. With a complete line up to make your Subaru the best in it competition, Agency Power has just released their all new Racing Downpipe. This downpipe fits all Subaru WRX or STI cars from 2002 to 2007. The downpipe is full stainless steel with a cast bell mouth upper section. The thicK flanges ensure a tight and strong seal. The downpipe deletes both your catalytic converters and bolts to all factory style turbos. The downpipe's precision welds and polished piping give the AP Racing Downpipe that cutting edge. Each downpipe includes a bung for an aftermarket air/fuel sensor as well as a bung for the factory O2 sensor.


When adding an Agency Power Racing Downpipe to your Subaru WRX or STI, you will gain more horsepower and overall performance. The downpipe allows for better flow of the turbine and wastegate gasses. Unlike the factor downpipe that blocks the wastegate gasses from being released in an efficient manner, the AP downpipe has a large bell mouth which allows for both to flow smoothly out and down the pipe. The 3 inch diameter piping is the perfect size for the turbo cars from stock hp to 500 whp. The bellmouth will also allow for a little boost increase since t HERE is less restriction. Mate this downpipe up with your aftermarket catback exhaust or one of Agency Power's catbacks for an amazing sound and almost 25 wheel horsepower gain.

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Vehicle Applications

Years Make Model Trim Chassis Engine Notes
2004 - 2007 Subaru Impreza Turbo (GD) EJ25  
2013 - 2013 Subaru BRZ All      
2013 - 2013 Scion FR-S All