IAG Performance Unequal Length Header With Uppipe

2002-2014 Subaru WRX / 2004+ STI

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SKU: IAG-EXT-1000We price match!

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The Unequal Length Header and Up-Pipe Package will increase the exhaust flow in the Subaru WRX/STI. 
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IAG Performance Unequal Length Header & Up-Pipe Subaru Models inc. 2002-2014 WRX 2004=2020 STI


  • Durable stainless steel construction on both header and up-pipe
  • Unequal length layout
  • Smooth mandrel bends
  • Increased piping diameter
  • Includes 3-bolt up-pipe
  • Increases horsepower
  • Increases torque
  • Produces the aggressive Subaru rumble
  • Improves throttle response
  • Reduces turbo lag
  • Includes zinc-plated hardware
  • Includes new exhaust gaskets



  • 2002-2005 Subaru WRX models require a 2.5L STI oil pan for proper clearance
  • 2002-2006 Subaru WRX models the STI oil cooler and oil pan
  • 2002-2007 WRX /STI chassis require slight modification to the passenger side U-frame



The IAG Performance Unequal-Length Exhaust Manifold and Up-Pipe is a great way to increase the horsepower and the torque while improving the turbo spool and really exploiting that boxer rumble. The header features true 304 stainless steel construction along with cast stainless flanges. The header also has a 45mm piping diameter to allow for an unobstructed flow path for the exhaust gases leading to the turbocharger. Because of the free-flowing design, you will see power gains across the entire RPM band. 

The header also features a slip-joint expansion section to accommodate for the flex that is caused by heat cycling and is TIG-welded to provide maximum strength. The up-pipe included in this package features a 60mm piping diameter with a 3-bolt flange, and it will come supplied with a multi-layer steel gasket to provide an optimal seal between the header and the up-pipe. 

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