BRAND: IAG Performance

IAG - Subaru 02-14 WRX/04-21 STI/05-09 LGT/04-08 FXT - Unequal Length Header & Ext. Wastegate Uppipe


Sale price Price PRICE: $1,319.99 Regular price Unit price  per 

IAG's 44mm External Wastegate Header & Uppipe Kit is designed to eliminate the OE internal wastegate, uppipe, and exhaust manifold, allowing for quick turbo spool up and precise boost control. Additionally, performance is improved as peak boost is achieved earlier providing a wider power band and the elimination of boost creep.

The IAG Performance EWG kit is manufactured from our 3-Bolt Unequal Length 304 stainless-steel header and uppipe. Each Uppipe is modified to add V-Band flanges to accept a TiAL / Turbosmart 44mm External Wastegate (Sold Separately). The uppipe features additional bracing to support the weight of the wastegate and prevent cracking. The kit includes a stainless steel dump tube that fits with many popular downpipes.

Kit includes:

  • (x1) Custom TIG welded 304 Stainless Steel Uppipe w/ 44mm V-Band stainless steel flanges
  • (x1) 16 Gauge Stainless Steel Dump Tube
  • (x1) IAG Performance Unequal Length Header "Retains the Subaru Rumble"
  • (x1) Adjustable Wastegate Locking Bracket (Holds OE wastegate shut)
  • (x5) Uppipe studs
  • (x6) Copper Nuts
  • (x1) Multi-layer 3-Bolt Manifold to Uppipe Gasket
  • (x1) Multi-layer Uppipe to Turbo Gasket
  • (x1) Turbo to Downpipe gasket
  • (x2) Manifold to Cylinder-head Gaskets
  • (x3) Zinc Plated Uppipe to Manifold Bolts, Nuts
  • (x1) EGT Plug
  • 44mm External Wastegate Uppipe


  • (3) zinc-plated uppipe bolts
  • (3) serrated flange nuts
  • (5) uppipe studs
  • complete exhaust gasket set

Fitment Notes:

  • TiAL / Turbosmart 44mm V-Band Wastegate Required / NOT INCLUDED
  • Will not fit with Nameless Downpipe
  • It May not fit with "Fully Divorced" downpipes.
  • Works with COBB and Invidia Downpipes


  • Subaru 04-08 Forester XT
  • Subaru 05-09 Legacy GT
  • Subaru 02-14 WRX (02-05 WRX Requires 2.5L STI Oil Pan)
  • (06-07 WRX Requires STI Oil Cooler and STI Oil Pan)
  • Subaru 04-21 STI
  • (02-07 WRX / STI Chassis requires slight modification to the passenger side U-Frame.)