IAG External Wastegate 38MM V-Band Uppipe Kit With Equal Length Header (TiAL Wastegate NOT Included)

2015-2021 Subaru STI

Ships for free in the 48 states


Out of Stock

The Equal Length Header and 38mm External Wastegate Up-Pipe will increase the exhaust flow in the Subaru WRX/STI.


IAG Performance Equal Length Header & 38mm External Wastegate Up-Pipe 2002-2014 Subaru WRX 2004+ Subaru STI


  • 304 stainless steel construction
  • Smooth exhaust bends
  • 4-2-1 equal length design increases performance on the top-end over the unequal-length designs
  • Each up-pipe is modified to add v-band flanges
  • Works with TiAL or Turbosmart 38mm external wastegate (sold separately)
  • The up-pipe has been designed with additional bracing to support the weight of the wastegate to prevent cracking
  • Saves weight when compared to the OEM components
  • Improves spool time
  • Provides precise boost control
  • Improves both horsepower and torque
  • Produces an aggressive exhaust note that will remove the Subaru rumble



  • (1) Custom TIG-welded 304 stainless steel up-pipe with 38mm v-band stainless steel flanges
  • (1) 16-gauge stainless steel dump tube
  • (1) IAG Performance Equal Length Header 
  • (1) Billet adjustable wastegate locking bracket (holds the OE wastegate shut)
  • (5) Up-pipe studs
  • (6) Copper nuts
  • (1) Multi-layer 3-bolt manifold to up-pipe gasket
  • (1) Multi-layer up-pipe to turbo gasket
  • (1) Turbo to downpipe gasket
  • (2) Manifold to cylinder-head gaskets 
  • (3) Zinc-plated up-pipe to manifold bolts, nuts
  • (1) EGT plug


Fitment Notes:

  • TiAL / Turbosmart 38mm V-Band External Wastegate required (not included)
  • Will not fit with the Nameless Performance Downpipe
  • May not fit with "fully divorced" downpipes
  • Works with COBB Tuning and Invidia downpipes
  • 2002-2005 Subaru WRX models will require the 2.5L oil pan
  • 2006-2007 Subaru WRX models require the Subaru STI oil cooler and STI 



The IAG Performance Equal-Length Exhaust Manifold and 38mm External Wastegate V-band Up-Pipe is a great way to increase the horsepower and the torque while improving the turbo spool time. This package will eliminate the OEM internal wastegate to provide optimal spool control with the use of an external wastegate (sold separately. 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 features a 38mm v-band flange to accept certain external wastegates like the Tial 38mm, as well as the Turbosmart 38mm V-band wastegates. 

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